Get Strong at Invading 4871870553, 9784871870559

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Get Strong at Go Series, Volume 5

Richard Bozulich

Kiseido Publishing Company

Get Strong at Go Series, Volume 5

GET STRONG AT INVADING by Richard Bozulich

Kiseido Publishing Company Tokyo, San Francisco, Amsterdam

Published by Kiseido Publishing Company CPO Box 2126 Tokyo, Japan

Copyright © 1995 by Richard Bozulich

All rights reserved according to international law. No part of this book may be reproduced by any mechanical, photographic or electronic process, nor may it be stored in a retrieval system, transmitted or otherwise copied for public or private use without the written permission of the publisher.

ISBN 4-87187-055-3

First Printing May 1995 Printed in Japan

Contents

Pare One

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| PEE HG CEO FMR ARS ae eee ee

Is

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Partebhireeioi Giu sare nig Mateo Invading Large Territories

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AN

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Preface Invading is an important technique that every go player should have in his arsenal. The purpose of this book is to give the reader a knowledge of the basic positions where invasions are possible and to present the main variations. The material is presented in a problem format. Each problem is part of a series of problems in which various lines are explored. The answers are usually short, avoiding long, drawn-out variations. In this way the reader can concentrate on the important idea of the invasion being studied. The reader is not necessarily expected to solve these problems; rather he or she is expected to look at each problem, think about it carefully, come up with an answer, then compare his or her answer with the one given. If you go through the whole book in this way, by the end you will have developed your judgment and intuition as to where, how, and when to invade. This is a book for players of all strengths. Parts One and Two should be accessible to 20-kyu players, but there is much material here that even dan players will benefit from. Part Three is more difficult, but the weaker player

should study it anyway, because he or she will be introduced to many important ideas. In this way, new ideas will enter your thinking and there will come a time when it will all come together and you will find yourself on

the threshhold of being a dan player.

Some Important Terms and Concepts There are a number of Japanese and English terms that are used throughout this book. Each of these terms has a specific meaning in go, and the reader should review them before starting the problem sections. As the reader progresses with the problems, these terms and the concepts they represent will become clearer. moyo

A moyo is a framework of territory, involving stones extending from the corners to the sides of the board. Some moyos are huge, while others are modest in size.

In Dia. 1, the four white stones in the upper left form a moyo. The four black stones in the upper right form an even larger moyo, where black has iv

mapped out territory along both sides from his corner enclosure. If Black were to play at ‘a’ with his next move, he would have mapped out a huge moyo in the upper right quandrant of the board.

Bees

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secotcescassecieee HERE

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sabaki Sabaki is a very important term in relation to invasions. When you invade, you are entering your opponent's stronghold. On the other hand, your stones might be split up by an invading stone. In either case, your stone or stones will be outnumbered, so your aim is not to make territory;

rather, you want to make good shape, rich in eye potential, so that your stones, if attacked, can easily make eyes in the area where they are attacked or move out into the center of the board. In making sabaki, it is not unusual to sacrifice some of the stones under attack.

light A light move is one which makes a flexible shape. Moves that make sabaki are often referred to as light.

heavy

3

Stones which are heavy cannot easily make eye shape and are, therefore, vulnerable to attack. If group of stones ends up as heavy, then these stones have failed to make sabaki.

In Dia. 2 on the next page, Black has mapped out a moyo at the top. If White wanted to reduce this size of this area, one way he could begin is to probe at 1. If Black blocks at 2, White will cut with 3 in Dia. 3 and play forcing moves with 5 and 7. What does White do now?

tft tt} eo} aude BPs eoui ahaa ttf SPReae nnerun PEPEEEET Oe z Eifal Dia.2

The diagonal connection of White 1 in Dia. 4 looks like an efficient move because it defends the two cutting points at ‘a’ and ‘b’. In spite of this, it is a bad move. Black will peep with 1 and 3 in Dia. 5 and, after Black 5, White is

left with a clump of six stones without any eye-making potential. These stones are now ‘heavy’ and will be forced to run away. As they do so, Black will attack, gaining both territory and influence.

Since White 1 in Dia. 4 results in a heavy shape, it has failed to make

sabaki. The correct way for White to play is with a ‘light’ move like 1 in Dia. 6. White 1 is called a light move because it doesn’t defend against the cuts at ‘a’ and ‘’b’. In other words, it regards the marked stones lightly and is willing to sacrifice them. If Black does cut with 1 in Dia. 7, for example, White can make shape with eye-making potential with the moves to 8. Here we can say that White has made sabaki.

vi

Black could also cut at 1 in Dia. 8. In this case, White could defend at 2.

Black must defend at 3 and White extends to 4. White has driven a wedge between the two black positions at the top. He also has at least one eye at the top with easy access to the center Again White has made sabaki.

Instead of 2 in Dia. 8, White could atari at 3. This would transpose into the position of Dia. 7.

thick A position is called ‘thick’ if it has few or no defects; i.e. cutting points. Thick positions are very useful in that they can be used effectively for attacking. On the other hand, it is hard for the opponent to attack them. ajl

Aji refers to the latent possiblities that exist in a position. Although these

possiblities may never be realized, their existence dictates the course of the game and enables certain moves to be made. In Dia. 9, the marked white stone in the corner is dead, but it still has aji.

Because of this stone’s aji, White need not fear Black’s pushing through at ‘a’, so he can jump to 1, rescuing his three stones at the top.

If Black does push through and cut with 1 and 3 in Dia. 10, White ataris with 4. After Black defends with 5, the aji of the marked stone comes to life and White captures Black's stones on the right with 6 and 8. Vii

Digitized by the Internet Archive in 2022 with funding from Kahle/Austin Foundation

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Part One: Invasions on the Side Problem

ee : sata

With the black stones on the left and the right, White’s three-space extension is vulnerable. Where should Black invade?

Problem 2. Black to play

White’s marked stone is high, while Black’s marked stone is lying in wait to gouge out White’s base. What is the correct move for Black?

Problem 3. Black to play

White has made a ae should Black invade?

extension along thefourth line. How

on tae

_Part One: Invasions on the Side PataTUMUTUTaTatE tat tatMAA TETANY

co

RiteratMbitatintttette MALTA NTRS TANATUTTER

1 Correct Answer Black 1 is the vital point. No matter what White does after this,

Black will have no problem.

2. Correct Answer 1 Black 1 is a strong invasion. It is the simplest way to play.

tanatatatatatanatatata terstanatatstara tatutataTsTuratetAteteTUTANEALAANATETSTT

Continuation

If White plays 2, Black pushes up with 3 and, after 4, attaches with 5. Black dominates the top.

Correct Answer 2

The high invasion of Black 1 is also correct, but it is more difficult.

arf Sa leTae (rs taalea Se Eee leieaslehe REP Woodly: tote s aah oe ioTee Raa

esnseeA

San

ae

Rinse sla ealaaieieelal BESET eR aes 3. Correct Answer

Variation

Invading on the fourth line

Black plays on the third line

with 1 is an effective move. It will now be hard for White to make sabaki when he attaches on the

with 1 because he wants to link with his allies. However, it will be easier for White to make sabaki when he attaches with 2.

third line.

es

Part One: Invasions on the Side SatataYMAMMALS LTAN ETE NTETEE TALETANTI TAPATETANTNEN

aM ystatatenirstatatetetaratutctatetatetaNANeMAtaTaMatat TARGA MATA LSTAASTAIMRTATETATETS NATIT TE TTHATH TALET TARTANA TSTTALLEY

Problem 4. Black to play

How does Black answer the one-space jump of White 1?

Problem 5. Black to play

How does Black respond when White attaches on top with 1?

Problem 6. Black to play

White attaches underneath with 1. How should Black answer?

ae as

_Part One: Invasions on the Side tRAtstatatats®ettts22U4aPa2PaPaPcOAMAVNETGACPITE ST SRGBATANARIUSTPATSMS PSPSPUTOTSPSRSREMSE POMPEY

fatatasseatataramatssssites

a

pelea ui 4. Correct Answer Simply jumping to 2 is adequate for Black. White is split into two groups.

Variation If White jumps out from the other side with 1, Black plays 2, attacking the white stone on the left.

a a

Teo] 0800]

a au

BEE 5. Correct Answer Black should wedge in with 2. Up to 6, Black has gouged out White’s base. Black is quite satisfied with this result.

6. Correct Answer

Black should hane at 1. A sharp exchange takes place up to 7. Black now threatens ‘a’.

ee

Variation White could also atari underneath with 3. White links up, but Black makes a large-scale moyo on the right when he plays 10.

Variation 7: connects (below 5) If White answers 3 with 4, Black

captures with 5. After connecting with 7, Black will aim at ‘a’ or ‘b’.

Part One: Invasions on the Side otatatatatatatsratatatatatatatetat eteTtatat teteU TPMT NEST PSPUEAMENSTERUNETAMA UT NERANTATOMATANSTSTARATSROTOTUES TAMTATASATAPAUL EETTOPPAREEMA ESTETATGPAPOTI ASTER POPAPETSPASTAPGSS TATAN TSN ACME

NEB TC

Problem 7. Black to play

White plays a diagonal move from the left. What is Black’s response?

Problem 8. Black to play

When Black makes the high invasion, White attaches underneath with 2. How does Black continue?

Problem 9. Black to play

If you didn’t like the result in Problem 6, there’s an even stronger way

for Black to play. What is Black’s strongest reply to White 2? =

NST

: : Part One: 3 Invasions on the Side

7. Correct Answer

Taking the corner with Black 2 is enough. White must still deal

Continuation After White 3, Black still has moves such as ‘a’ to annoy White

with the marked black stone.

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not

g g 068

ag

8. Correct Answer The moves from Black 1 to 5 are the simplest variation. White’s stones have been separated into

two groups, so Black can look forward to attacking them.

Variation Crawling to Black 1 can lead to complicated fighting. After White

ataris with 6, he peeps with 8. If Black connects at ‘a’, White plays ‘b’, making very nice sabaki.

HSE 9. Correct Answer Black 1 is a very strong move. If

Variation

Against White 2 and 4, Black

White draws back to 2, Black links

plays 3 and 5, taking a big chunk of

up to his allies on the left with 3. White’s stones are now separated and Black has a superior position.

territory on the right. It is going to be very hard for White to make sabaki now.

Saf «co

Part One: Invasions on the Side FREER

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Problem 10. Black Sait to

This time White has switched to the corner with an invasion at 1. How

does Black respond?

Problem 11. Black to play

Again White has a three-space high extension, but the neighboring black stones are on different points. How should Black play?

Problem 12. Black to play

In response to Black’s invasion with the marked stone, White plays 1 and 3. How should Black respond?

i

Part One: Invasions on the Side Sratatatatetanatanataccnatatatatatstatatatatatatanenatetatst8MG LAEBSP ATE GAMUTSETSPENCT TEREPCTENA TTATARSPAPUA TMSDEA ROTANSBR BOPOTA SSTCTOTSYTOISTSRBUS MSECTSTMS PATEL SANTIS SLRS PINSTERY GTS ASIN NYSE PRETEEN

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ATTA TOOo} Career 2,

10. aa Answer Black should let White the corner and make a wall outside. White’s two stones top are outnumbered, so

should easily make ev

Variation

live in on the at the Black

there.

11. Correct Answer Black should make a deep invasion

with

1. This time, when

White attaches with 2, Black simply extends to 3, then jumps lightly to 5. White must complete his shape with 6, so Black ends in sente.

12. Correct Answer

Black should simply descend to 1, taking the corner. White still cannot link up his stones. Sige

If the right side is important to Black, he could block with 4. Black ends with sente, so he can now

switch to attacking the lone white stone at the center top with 8.

To appreciate just how big

Black’s invasion is, suppose White played 1 and 3 first. After 5, White has a large territory at the top and he is also threatening to invade the right side.

Failure Black 1 is possible, but after White 2, Black suffers a loss in the

corner.

Part One: Invasions on the Side smuntmttmttneTTtTttEt

PUT TENTA AN aratatatits

i

Problem 13. Black to play

White attaches with 1. What should Black do?

Problem 14. Black to play

White is overextended. Where should Black invade in this position?

Problem 15. Black to play

Having played the marked stones, White returns to attach at 1. How does Black reply?

Part One: Invasions on the Side SYN STNGES YATAEANAN SATANSTATA

ETATGNATASUT NAT Y TATSTNTETSTASUTLAEATAPSPOTATATANAEA ESTARTANATETEEA ATAPI EATENTATA TAREEAEATATATE

13. Correct Answer There are two correct answers: Black 1 and Black ‘a’.

Variation Black could even play elsewhere. White might then attach from above with 1. Black forces with 2 and 4 and takes sente again.

14. Correct Answer Black 1 is the correct invasion

Failure for White If White jumps to 2 with his stone on the left, Black confines the white stone on the right with 3. White's play here is unsatisfactory.

point. If White plays 2 and 4, Black jumps to 5.

15. Correct Answer

Unsatisfactory

Black 1 is the vital point. The exchange continues up to 7 and the white stones have been separated.

If Black hanes on the other side with 1, White can make life at the

top up to 6 in sente.

Moreover, the white group at the top is still not completely alive. eg is

Part One: Invasions on the Side statatotataratatatonetatetatatatamtatatatutatatatetanatatatitatatet totetatatatta hate

vatstat

SOMES AERANNNSNatitaNatata tatatstatatatarNTT BOTAN TaNARESYaRSTa tatattata AtGHSHAMaR

NCTA NaS SHAMANSHata STSNATGRAIL STARTINS atatatatatatatatatstat

Problem 16. Black to play

The moves to Black 3 are normal, but, instead of ‘a’, White ataris with 4,

aiming to invade the corner at ‘b’. How should Black answer?

Problem 17. Black to play i

z=] _ z we is i

White cuts wi ith i.sm ow should Black respond?

Problem 18. Black to play

White jumps to 1. What is Black’s strongest move? ie

Part One: Invasions on the Side stotarasasaratatatasatenatetasatatatatatatatanetans ttatatets Mettetetatatatsta state TaMAEEPataeGts a GUGM PGRMS TESTE

ME MSPSERTSHTSMETERSTSPSTGSTGTESST TOUT ST SRSGIGNESSGTSSPA RETESET TG BRST PSMA NSTGNGTUESYSTS AMUN PSHM tt tteHattMRR tNAaah te RNa taEt

16. Correct Answer _6: takes ko Variation Defending the corner with 1 is This is the usual variation. After best. White next plays 2 and the — White 8 and Black 9 are exchanged, moves to 7 are natural. Black has = White must think about completing no reason to be dissatisfied. his shape with a move at ‘a’

17. Correct Answer Pea Black should atari with 2 and It would be prudent for White take profit by crawling with 4 and _to settle his stones with the moves 6. After White 7, Black jumps to 8, _ to 7. Black can now aim to play ‘a’, and he dominates the top left. again dominating the top left.

18. Correct Answer Black should bump against the white stone with 2 and then jump to 4. This is the strongest counter.

Failure If Black simply jumps to 1, —-White attaches with 2 and links up his stones with the moves to 8.

et ye

_Part One: Invasions on theSide_ shistuntitinitetentratotemttieatstoeataas tatanntatoneritatattet tutatatats

This time Black hanes from the other side and the moves continue to 6. What should Black do now?

Problem 20. Black to play

White has made a four-space extension along the top. Where should Black invade?

Problem 21. Black to play |_| HEH

Even when White has the two stones on the right, the four-space extension is a bit wide. Where does Black invade? es (hen

Part One: Invasions on the Side AcuEUtTEUTEUTERT TEES

19. Correct Answer Black 1 is a good move, even though White can live in the corner with the moves to 6. After Black 7, White

must

fix up his

shape by playing at ‘a’, while Black ‘b’ is sente. Black is satisfied with this result.

85a UA EARETONANATACATATA ATACATATATATGNATACAMSTATANANGUATETATANATGTOTTATARARAPARLTATASAAAPLUATATATANAIEARANGPUTATATATINS

If White wants to attack on the left, he will play 4 here. The moves continue up to 9, and Black gets a large profit in the corner However, a white move at ‘a’ or ’b’, threaten-

ing Black’s stones on the left and right, could later be troublesome.

eS Ltt

a ates si aaee tel bled tote SsdRR2) dab 2 Qa b

Black 1 is the vital point to in-

|| | Bi CN SRR eae aReeeess | RSENS aRRae a Continuation If White jumps to 2, Black fol-

vade. In this case, it is even better

lows with 3. After 5, Black can at-

20. Correct Answer

tack on the left or the right.

Variation

21. Correct Answer

Black 1 shows good go sense. If White tries to link up his stones with 2, Black presses him into a low position with the moves to 7.

Black could also invade deeply with 1. However, White can confine Black to the side with 2 and 4. This will lead to an all-out fight

nara wes

Part One: Invasions on the Side Sada eta

ANA REtet MAHA

Tate TATEMASALA ITAA I TEALANATL TERT TERETE STP NTE STATI

TAPP

TA TEPORED RE BHATTI

HS NOTNABST PMET RStTMAAMATa staAANSTa

Problem 22. Black to play

FE aoe oteHow does Black respond to White’s attachment at 1?

Problem 23. Black to play

Against Black’s invasion, White attaches at 2 and cuts with 4. How should Black respond?

Problem 24. Black to play

White and Black have exchanged the marked stones. Where is Black's invasion point now?

LE

Part One: Invasions on the Side NSM

anatatATTN tat NANT TLL

TOUT TTIN

Pata tatatat anatase atatataNetatatat st statstaNaTNate TANNER

atatatatatatatata NatatAN UtitaNatstotCTANTETA TITLES TET

i 22. Correct Answer

Continuation

Black 2 and 4 are a simple way

of playing. Black 4 at ‘a’ is strong, but it becomes very complicated.

Later, White can start a ko by

_ playing 1 and 3.

23. Correct Answer Variation Black is strong on the right, so Black 1 and 3 are a nice tesuji. Black 1 and 3 are best. White’s posi- —_Black gets a wonderful ponnuki in tion on the right still has defects, | the center of the board with the but Black is ason both sides. moves to 7.

24. aaa

eld Answer

Black’s Failure

Black should first peep at 1, Invading deeply at 1 could be then play on the vital point of 3. disastrous for Black after White When White jumps to 4, Black _ caps with2. jumps to 5. Black can now attack on either the left or right. onl eet:

Part One: Invasions on the Side watatatatetatatatatatatatatanatatatatonetatara tatatatatatetetetstatatetstetSTaTetetetats

MAGAteTETAESSTARA tetstatatatatataNaNaNatta

T tatalaratatatatatatacatatan tataticataatatotaU tara tataReteratatate tetetettatsTattStatePat Tata TATAPATLTG TS UBBPOPST PATA

tatattastePaN ETS TETAESM AE

Problem 25. Black to play

White has made an ideal extension from his two stones on the right. However, it is still possible to invade this position. Where does Black play?

Problem 26. Black to play Http

ty f-

White’s position is impressive, but it is not yet territory. Where should Black invade?

Problem 27. Black to play

Black attacks with the marked stone, aiming to invade. If White doesn’t defend by playing at ‘a’, where does Black invade? —

_Part One: Invasions on the Side

5:

Uneaten

MEAS

SYST TATARSTAN ETAT:

TETAS

meatatatatatstatetatuetetatieatsestat

ficsite Aeie CHEECH + |_|

»||

a

BEe aes

25. Correct Answer Black should invade at 1. If

Variation If White attached underneath

White attaches at 2, Black links up

with 2, Black would play the moves

to his allies on the left with 3 and 5.

to 9. If White 8 at 9, Black plays 9 at 8. Either way, Black is satisfied.

26. Correct Answer Black invades with 1. Since the position is symmetrical, he could

Continuation If White responds with diagonal moves at 2 and 4, Black at-

just as well have invaded at ‘a’

taches at 5. Black is firmly established at the top.

27. Correct Answer

Black 1 is the vital point. Black threatens to link up with his stones to the right by playing at ‘a’. White

must defend at 2. == 8

Failure An invasion at Black 1 is also

possible, but with the moves to 12, White gets a thick shape in the center of the board.

_Part One: ' Invasions on the Side Aa terRANtAtat ET

TANtate

ATTAH

tsattetetita ART

NEUE EUETEE

Problem 28. Black to play

White counters Black’s invasion with the diagonal move of 2. How does Black respond?

Problem 29. Black to play

What should Black do when White attaches with 2?

Problem 30. Black to play

After White plays the marked stone, how should Black continue? Tes |(6es

Part One: Invasions on the Side

28. Correct Answer

Variation Black can also cut at 3. After White plays 4 and 6, Black again

Black plays 1 and cuts with 3. Black 5 is a steady move threatening to link up his stones at ‘a’ or ’b’. Black 5 at ‘c’ is also possible. /

descends to 7.

Seay Ceca alate ee) cies Pee ZSa

Continuation If White blocks at 4, Black lives

do ‘QB

aire

om

a : e

3° & 3 NM

& che Bon

S

5 oO o « O #

ieeeyma—&

ae

vo

wv

BRE="

re

up to 11 and takes the corner with

Fe 3 oa Sia BREE emieia ae ¢ Bar un =©

29. Correct Answer Against White’s attachment you should remember Black’s wedge at 3. This is Black’s strongest reply.

30. Correct Answer 1 There are two correct answers.

Black plays 1 here if he wants outside thickness.

Correct Answer 2 If Black wants to link up to his stones on the |eft, he will play 1 on the second line.

Part One: Invasions on the Side StaNatatateratatatatatan St RPaPSTLATTA TSTONUTA AORETANETUR TETAS

TSTSSBSH tttSEMESTER Tataattach tatatadatatatat

aaa NSTATATSTGNSNat Eta tetaMaMaaat NatsASTANA

TTP

TUTE

Problem 31. Black to play

yer ere payer ees The white

stones

are overextended.

Black has to attack now.

How

should he play?

Problem 32. Black to play

When Black wedges in with 3, White ataris from underneath with 4. How does Black answer White 6?

Problem 33. White to play

How does White answer Black 1?

SS)

_ Part One: Invasions on the Side atacatatta NaNaTata TatstAMaTARaTATATASL NAITO TSTATATGEU TUS TAPSTASGERTTGTATUTOTUTAATAMA

31. Correct neue Black 1 is the invasion point. This urgent move takes priority over all others.

TATAETNA TATATASA BATONEMAAEAAPSTETETTETLAEE TS ATRTATETEESEAT

Continuation If White attaches with 2, Black plays 3 and 5. White tries to link up with 6 to 10, but Black cuts with 11, catching three white stones.

a tS gig me

PETE 32. Correct Answer

Although his position looks precarious, Black has nothing to fear. Black ataris with 7 and extends

to 9. Before White does anything else, he must resolve the problem

Continuation White must escape the ladder by playing 10. Now Black forces with 11 and 13, forcing White to play 12 and 14. Finally, Black plays 15 for an excellent result.

of the ladder

33. Correct Answer. White 2 is the only move. Up to 6, White has linked up with his allies on the right. Later, White can aim at ‘a’.

White's failure Pushing up with White 2 results in the moves to 9. The white stones on the right now come under attack.

my yee

Part One: Invasions on the Side

PERRARINTAT MEY TNATATETATAT ARETENANANOPATATITANMETAL VNAAETO AAAS taatta taevstaNToESEVATATATEEANteVtstetettata tetereRNNTUELtete ETN

CCT

ISTEP

TANTSTESTES AAIE

Problem 34. Black to play

If White responds to Black's invasion by attaching on top with 2, how should Black answer?

Problem 35. White to play

Black 3 is straightforward and avoids complications, but it is a bit lukewarm. How should White respond?

Problem 36. White to play

eels eles Es BeEee tO She Ae Sebdh ee Cites Jee PS BD a SBcl Ss a e

EEEECE EHH a | ia

cal atlas (a

a

a

How does White respond to Black 1? Bay oe

ae CHEE tie

_ Part One: Invasions on the Side

SAM NNaRGSAAR RSASPARSNa NETCTANSTAE TRENT STROMA TATATENCEE TERN EREE STETTEE

=

sistas

34. Correct Answer

Sliding to 1i extending two spaces to 3 is joseki. If White wants to extend three spaces, he should not exchange 1 for Black 2.

Against 2, Black should play 3 and 5, and the situation is similar to the answer in Problem 31. Black can

link ie by uesat ‘a’ or ‘b’.

ELST apaeS gE COOSE oe Be 35. Correct Answer White should play 4 and 6. Black is still able to link up his

Continuation

White keeps the pressure up with 8 and 10, enabling him to play the forcing moves of 12, 14, and 16.

stones with 5 and 7, but...

The result for Black is not as good as in Problem 32.

rg

ERERDERY Ia Ae

ue4 ES ara

White's Failure Preventing Black from linking up with 2 fails. Black plays 3 and 5, and the white stones on both sides come under siege. If White 2 at 3,

36. Correct Answer

White 2 is the only move.

Black 3 at ‘a’, White 4 at 2, Black 5.

ey) |

Part One: Invasions on the Side PataatatataPatestoPePeMsSA BLASTSTET NESPCPEESsULIMETN PS MORCTENEETED

tatatatatoMet Mutaaitatchatatarst sti s2sPcONMEAP

PNM R

PATTERNS

RET NATE

UN

ET EEETEENNOEUT

Hcg ar NO ROC E nels ret ttteté a ac LAA EaEa cd coe Since Black has played the two marked stones, he dominates the top of the board. From this strength, where should he invade?

Problem 38. Black to iH

SST Sett|aie eis Here is another position that often occurs in handicap games. Where should Black invade?

Problem 39. Black to play

Rersecounec ye oe Fe Saretacuote

Bone ete

ees

In response to the marked white stone, Black has a tesuji that he must play. Where is it?

Sone

Part One: Invasions on the Side SAMAR YAYaMAMA STEM AANA ETAT TETTUETATAEM NEETU

UNENEUEN

37. Correct Answer

Jumping into the middle of White’s formation with 1 is the vital point. If White attaches with 2,

TEEN ELE REET ETI

EERE

ETE

A NaNTT ARIST TEEPE eretunntstit

Variation If White settles himself with 1,

Black is more than happy to play 2 and 4.

Black links up his stones with the moves to 7.

38. Correct Answer

The high invasion at Black 1 is correct.

Dangerous Invading deeply at 1 is also possible, but this could be risky because White would have many chances to seize the initiative.

39. Correct Answer

Attaching with 1 is Black’s

Failure Simply crawling to 1 lets White play 2, giving him thickness on the outside.

SEAR

RATAN SARA

Part One: Invasions on the Side T SPIE

OLASTNGAI EPTPDT LANNE LTTE GNA TNMSN

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that tetas STatatattateta teetaTatattatstaMat TT aT

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Problem 40. Black toai

White answers Black’s invasion with the diagonal move of 2. How should Black respond?

Problem 41. White to play

Black has invaded deeply with 1. How should White play?

Problem 42. White to play

arsearer es MaasOOO: +H sug

How does White respond to Black 3? eO7ie 2

Part One: Invasions on the Side SPEMSMSPRENLRUN ASRS ATMA

PITTI

sasat

TAMA BLELP ANITA

NEES

E ACEP EPRI

PEELANE YS PSTANETE TPS TCTLESTERSMENS EPSBAIETST PLIENG EECTENS TESTES

Continuation

40. Correct Answer

Black should push up with 3, then attach with 5. After White 8 —

Black links up his stones with 1 and 3, while White makes thickness in the center with 2 and 4.

peepernic ear.

BETAS

Be

-

41. Correct Answer

res

OO®)

Continuation

White should first exchange 2

Running away with Black 1 is

for Black 3, then attach with 4 and 6, hoping to lure Black into playing

7. White then caps the black stone

natural, but then White switches to the corner and forces with 4, 6, and 8. After White 10, the black stones

at 1 with 8.

in the center are trapped.

42. Correct Answer

Variation

White should push through with 4 and play the moves to 10. This is joseki. Black can still play ‘a’, leading to a complicated fight.

White can avoid complications, by first exchanging 1 for 2 before playing 3. This defends against Black pushing through at ‘a’ after White 11. White gets nice thickness with the joseki to 11.

aes

Part One: Invasions on the Side SEAMALSRANaYUTETAMMUTANSTSTANEETERS Ea TERATATSTETETTANATAHME TENATATANATENSTORATSI ETTSTAIVELATT MANNA RONNIE TSB

PATEAECETANEPONON

Rasa NRANATat ANUTSTENATRGNENOTSNEARSRETAPATATARETSNATITSTCTATETATOPSTAR PENANG UUTAN SEENSPETOTTSS

Problem 43. Black to play

White stops Black from linking up by descending to 2. What should Black do?

Problem 44. Black to play

How should Biack answer White 1?

Problem 45. Black to play

There are so many places where Black can invade. Where do you think is the best point?

cacy:ee

é : Part One: : Invasions on the Side MARE

ee fied

LC

TAASRETENANT ATT

TT DPT

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aooc aS28 ~

ts BEEP al aE seas Boar ale ieee al

43. Correct Answer Black should play 3, isolating the three white stones on the right.

SRR ERBSEawE RRRSERSerY || tT @le! rll Tl tO | Bier Veaaes Se @He dane Pees alelial ees ee (ee Gl ea Two Renae

SNA ANA At

Comtiiton

If White cuts with 4, Black makes shape with 5. White must defend with 6, but after 7, the four white stones on the right are dead.

+198ig?

eo oe 2a ee 3 || HE >| as Ea Gag Ll@ | |

Variation If Black wants profit in the

44. Correct Answer

Black must not play passively as in Problem 41. Instead he should take the initiative by playing 1. If Black wants thickness, he can play the joseki from 3 to 7.

45. Correct Answer

Black should play near White's strong side with 1. This is the correct invasion point.

tee oN Dp

corner,

he will block at 3. The

moves to 15 are also joseki. Black can make a deep invasion if he knows these josekis.

Continuation If White jumps to 2, Black is also happy to jump to 3. Black has split White into two groups.

cas, eae

Part One: Invasions on the Side nhtatatonuatrtitinesttNRt,

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Problem 46. Black to play

White's stones at the top are nicely balanced, but he is still vulnerable to an invasion. Where should Black invade?

Problem 47. Black to play

White caps the black stone in the center with 1. How should Black respond?

Problem 48. Black to play

White attaches at 2, ening to make sabaki. How should Black respond? a.

oe

Part One: Invasions on the Side PaTaNa

NatatatatatetataNARRtE Nt AMAT TARETOTATAHATERNAPATAPTUE ETAACTIOTS TPMT RNSTSNEEE ANTEC ENCANA tT

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Ps ot ra a Se ASSNRR ld ial ES pele eles igRe SBR 458 reat eS did eb BRA beye Selle Continuation White 2 is the best response, but

46. Correct Answer Black 1, in the middle of the three-space extension, is the vital

Black easily links up with the

point.

moves to 7.

47. Correct Answer By playing 1, Black turns the tables on White. White must save his stones on the right, while Black is in no danger

48. Correct Answer Black should block at 3. White will then crosscut with 4, the usual

way of making sabaki. But —

Variation. Since the capping move is unreasonable, White

has no choice

but to jump to 4, letting Black take the key point of 5.

Continuation

Black counters White’s plan by playing atari with 5 and 7, discarding his marked stone. Black is thick on the left, so it will be hard for

White to invade the corner at ‘a’. ee

Part One: Invasions on the Side starotatacatatatacatatstatattatatatatatats tenetSetatatatat tat MTP RATATGNUMSTOTP NST TOEGH ARNEa BARSTaMGa

TataEGMSNGatt TANS TRS ESTGPAUSES UPSTATE TS STAGE ANSORM A TSESTST STAPH NENT

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Problem 49. White to play

Black has neglected to play at ‘a’. What should White do?

Problem 50. Black to play

ete caePET r This time White has the marked stone in place on the right side. How should Black answer White 1 now?

Problem 51. White to play

Black makes a deep invasion with 1. What should White do?

Boise.

_Part One: Invasions on the Side atutatatstatatetatau tatetatatetets tetera

statutes

tate avatatatstatatatavatatat astaPstaNats tet sTaPaTeUatsTA tA tATAUA RATEELTANESSTAAUTANAY ATANA TAPES TANAEATEN EMATOTEE

|

49. Correct Answer Neglecting to play at ‘a’ in the problem diagram is a mistake, since White will hane with 1.

Continuation Black has no choice but to submissively link up with 2 and 4, after which White becomes thick in the

center when eaeas he 2

ae

Oial ce

re2G

aia 5

ic

50. Correct Answer Black must move out into the

center with 1. If White caps with 2, Black can easily break out into the center with 3, White 4, Black 5.

Failure In this situation, if Black in-

vades deeply with the marked stone, Black has no effective moves to rescue this stone after White 3.

51. Correct Fpske

Another bad invasion

Against Black 1, White will cap

Even though it is high, playing

at 2. After Black runs away with 3, White attaches at 4 and can easily make a living group in the corner

1 one line to the left is dubious. White 2 and 4 hit the mark; Black

will not get a good result.

mac) ae

Part One: Invasions on the Side satatetatatatatatatatUta tatatatattePONCNETETSATSTONACALATATGMIATA PATENT BEENTANTRA PTAA a Tattata

ts

Although it looksli FRe a tesuji, Black 1 is a dubious move. How should White respond?

Problem 53. White to play SPE

ee tt ir

rt

Black's three stones on the right are a bit thin. Where is the vital point to invade?

Problem 54. Black to play

Where should Black invade White's formation at the top?

=.

Part One: Invasions on the Side PEAT

NN Tat

NEA TARTAN

satan ataV TADS PATAUTEATETALETETA TERENAS

TATEMATETATATA EA

Puta tatatatuvstutsTatstetatyPatete tatstanaTetAtAtePATAtaBAPSTEPAEATANAT

TUT LETTE

oo] 5

: LOOOC

52. Correct Answer 8: connects White should atari with 2 and

play the moves to 10 (later White can start a fight with ‘a’, Black ’b’/).

White's failure Playing atari on top with 2 is exactly what Black wants. Up to 5, Black’s invasion is a success.

Instead of connecting at 8, White

could opt for a ko by playing at 9. This could be dangerous for Black.

53. Correct Answer White 1 is the vital point. After Black answers at 2, White will link up with the moves to 9.

Failure Answering 2 with 3 is bad. Black forces with 4, 6, and 8. After 9, White is left with bad shape.

54. Correct Answer

Failure

Black 1 is the best move. If White attaches at 2, Black descends

The diagonal move of White 2 is not good. Black pushes up with 3, then descends to 5, enabling him

to 3 and he can link up at either 5 or ‘a’. White is satisfied with his thickness.

to link up with ‘a’ or ‘b’. White’s stones are thin and vulnerable.

en.) ae

Part One: Invasions on the Side leraratatatatANAN punutUTUNAREtT WUE RUENAU LET Ahn ERLE EERUAAUT UM TELNEAT ttt

Problem 55. Black to play

The invasion of White 1 often occurs in handicap games. How should Black respond?

Problem 56. Black to play

The deep invasion of 1 is another move White has in his arsenal. How

does Black reply in this case?

Bast. fae

: : Part One: : Invasions on the Side ataratatatatetatatat Matetatatst

55. Correct Answer 1 The diagonal move of Black 2 is the strongest response. Black confines White to the side with the moves from 3 to 6. This is joseki.

Correct Answer2 Playing the diagonal move of Black 2 from the right is also correct. It often transposes into the position in Correct Answer 1.

estsster Continuation 1 White jumps down to 7: he

Continuation 2 The moves to White

17 are

aims at either 9 or ‘a’. Black 8 is

joseki and White’s group at the top

best, taking the larger territory on

is alive. Black is satisfied with his

the left. With

territory at the top left and his

9, White

starts

making two eyes at the top.

thickness in the center.

Timid When White hanes with 5, Black must cut with 6 in Correct

Answer 1. Playing 6 as here is timid. White gets a good result when he connects with 7.

Variation 1

Attacking from the right with Black 1 is also possible. White jumps to 2 and Black captures two stones with 5 and 7. Black’s result is inferior to Continuation 2.

2a 3R a

Part One: Invasions on the Side UTD TAAAUN ANAT

AAVARERATATTAANANATENAYARALSLET AATATATTAMA AILNUAT PETGTATA ANS TATEVANATATAY EZANSUAT RANATAPTAN EUET REDANANANERENETARSTT NAILER ANALY ANAL

Variation 2 Jumping to 2 is also possible.

Black 2 is overly defensive.

After White 3, Black jumps to 4, attacking the white stones on both the right and left. If you are good

After White jumps to 3, Black must defend again at 4. Black has enormous power at the top, so he must

at fighting, you can play this way.

not play so submissively.

g |

O Jumping towards the edge White might respond to Black 2 by jumping to 3. In this case, Black will certainly play at 4.

Attaching with 2 is not recom= mended. Black can take territory at the top, but White’s ponnuki gives him the strategic advantage.

-5) SSS

HHé

Tr

Variation 5

Attaching underneath with Black 2 is also bad. White lives at the top with the moves to 9. Black has no territory and his thickness is not very effective. —

Drawing back Drawing back with 4 after attaching at 2 is very bad. White connects at 5 and the marked stone has lost much of its value. White also has the option of invading at ‘a’. 39—

Part One: Invasions on the Side statharatanatatas satatatetaetataPat etSRatctsBePe TCSP

NTETA SLT NETSTAT

ETRE TESTE

UTA

RTE

ASAT

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TETTET TENT

56. Correct Answer Attaching with Black 2 is the strongest move. White is now

joseki. Black gets territory on the

forced to make life along the side.

left and thickness in the center.

Variation White could push through with 1 and live with the moves to 7. This is also joseki.

The

moves

to White

9 are

Bad move

Defending with Black 2 is bad. When White makes a deep invasion, your first instinct should be to confine him to the side. Instead of 3, White could attach at ‘a’, Black “‘b’, and White cuts at ‘c’.

Attaching with 2 (or ‘b’) is even worse. White is out into the center and still threatens a move at ‘a’

Defending If you are going to defend, Black 2 is the only way. After White 3, Black jumps to 4, attacking White on both the right and the left.

Apes

Part One: Invasions on the Side atatananenaratatatatatatatatatatatetatetsteestatatatate ts PITAL THsM68ISNT TINE TSRANTSNTN TOUNS NTN

atatatatatetats tsaAatatats ttt

White seems to be afraid to play 1 at ‘a’ (White 5 in the correct answer to Problem 55), but White 1 here is a bad move. How does Black take ad-

vantage of this mistake?

Problem 58. Black to play ttt ttt

tt

UG SeRee APG Gr Gee fadieie-"ad @ dala ie dialer se

HEE ae

Black 2 gives White the chance to attach and cut with 3 and 5 on the left. With good play, however, Black can come out of this position with an advantage. How should Black play?

Problem 59. Black to play fff

|

Setelelk cin

BaarShl

HEHE

ela: BERET

White wedges in with 1. How should Black respond?

2 : Part One: ; Invasions on the Side atatatatatatatatetatatatite

%

pataratatatateuTtitatit

57. Correct Answer Variation Black shifts the attack to the If White might turn at 5. Black right with 2 and 4. If White 3 and5, —_—cuts at 6, seizing the initiative on Black plays 6. The white stones at _ the right side. the top are almost dead.

ac Ee 58. Correct Answer

Variation

Black should atari with 1 and

Black could also play 1 and 3.

extend to 3. After 4, Black confines White to the side with 7. White

After Black 11, White's group is still not alive, so Black can make further

lives with 8. Instead of 7, Black could play ‘a’— White ‘b’Black ‘c’.

_ gains by attacking it.

59. Correct Answer

Failure

Black should atari from above with 2. White lives with the moves

8: connects

Playing atari from underneath —_ with 2 is not good. After White 9,

to 19, but Black’s thickness in the

the three black stones on the left

center after 20 is overwhelming.

will come under attack

poeny ee

Part One: Invasions on the Side Stavarananananetatatanate etetett Mat aAATARTANATATE

IA NETTLES

TETANITS

Nah YaNTARANATON TAYETSNETANATOTAAL TANTRNAS PNSRATAPSTAN STU OSTATAVAEVETARAT TANT TAEAPATETS ETAL TA ITAA TSAATRAONS

Problem 60. Black to play

orth

How does Black answer White 1?

Problem 61. Black to play

A ladder towards the left would

be favorable for Black. What is his

strongest play?

Problem 62. Black to play

This time White wedges in on the right side. This is a bad move. How

does Black respond? —43—

Part One: Invasions on the Side sanananaeanatatatatatete tes AtANTAL AAA TEAR ATTEN TALON

TATATONSTTTATATATA POTOTOATNETS PAPUA AAMAS TATANATANSNUTE TSEATENCTANOTATSPATATSCATATAUATANAVASAFATAASATUNNATATETATEVATATOTOTALATATUNANATOTARATASUIUTATATANAPUUTASATATATATATATA MANATEE

60. Correct Answer

Continuation

Black should calmly block with 2 and, when

White ataris with 3,

descend to 4. After White 5 —

Black ataris with 6 and 8, then plays 10, confining White

to the

top.

61. Correct Answer Since the ladder is favorable for

Continuation Black ataris with 11, but, after

Black, 1 is a powerful move. With

—_ the moves to 17, he must escape

the moves to 9, White’s stones at

into the center with 18 and 20.

the top are in trouble. Next —

After Black 21 the left quarter of the board is dominated by Black.

Septetteteteeett| SEE EEEEHE [| TI

telat tars FEEL

Lape

Ean

eesanauebak LC) Be: Hk

REQSER

a

62. Correct Answer This time Black must atari from

Continuation 4: throws in at @ ; 5: takes

below with 2. The moves from 4 to inevitable. Black next

plays 14 and...

ed

AbAnTS BHO

se BEE aie

13 are now

TT

White must capture with 1 and 3. After Black 6, White can live at

the top, but Black’s thickness in the center is overwhelming.

wth 2

- Part One: Invasions on the Side

Problem 63. Black to play

ane

White invades at 1. Although on the second line, it is a vital point of this formation How should Black respond?

Problem 64. Black bah to

14 cca gic

This time White invades at 1, a trick move where Black can easily go wrong. What is Black's strongest and safest response?

Problem 65. Black to play

White 1 and 3 are also trick moves. Black 4 and 6 are natural responses, but what does Black do after White 7? a

eo

: é Part One: : Invasions on the Side

1).

Correct Answer

Black 1 is the vital point. If White jumps to 2, Black will block off the territory at the top right with 3. White then escapes into the center with 4, and Black follows

suit with 5. Black gets territory and White is still under attack.

If White extends to 2, Black still

blocks with 3. After the exchange of White 4 for Black 5, White can live,

but this time Black gets both territory at the top nght and thickness in the center

64. Correct Answer

The diagonal move of Black 1 is lukewarm. White first pushes into Black’s side with 2, then jumps to 4. After Black attaches with 5, White

easily lives with 6 and 8.

— AG

Black 1 on the 3-3 point is a safe and steady move. In order to get life, White must jump to 2, but Black confines him to the side with 3. Next —

_Part One: Invasions on theSide

an BREST Steer Failure

White tries to break out into the center with the moves to 10, but

Black’ keeps White confined to the top of the board with 11. White

This time bumping into White with Black 1 is not a good move. White can jump to 2 and skillfully live with 4 and 6.

will have a hard time living.

ac By SESRAERED Failure

65. Correct Answer

Black should force White from

the right with 1, then play 3, induc-

Forcing from the other side with 1 is not good. White gets the

ing White to atari with 4. After Black connects at 5, he can play 7,

corner with 2 and 4, and Black's

breaking into White’s moyo on the right. White’s stones at the top are

centrated.

still in danger

SAF

stones

at the top are overcon-

Part Two: Invading Corner Enclosures Problem 66. White to au

White has attacked the small-knight enclosure - attaching at 1. How should White follow up his invasion after Black extends to 2?

Problem 67. Black to play

Black wants to invade at the top right. Where should he play?

Problem 68. White to play

Black has stones on both the left and the right. Where should White invade?

LANG ces

_ Part Two: Invading Corner Enclosures aueunns eanat

eae

sataratatonsta

cearatatatasaye tate LETTS:

na

PAU ANNATA LET NUNS TAPANTANEPATANAYATANATALATANGTAESTACAV UNAVASATANATAN CNASATANANAEALETABANAN TATATATATEEACATOTINOS

aeithe 66. Correct Answer

White easily lives in the corner with 3 and 5. However, the corner

territory is small and White ends in gote, so the timing in playing these moves is crucial.

Variation Living in the corner is small, so White might play 1 and 3. If Black attacks with 4, White jumps to 5,

aiming to make sabaki by attaching at ‘a’. If then Black ’b’, White ’c; if Black ‘d’, White ‘b’.

elles

a

67. Correct Answer Black first makes a shoulder hit at 1 and, after White defends at 2, invades the corner with 3.

Continuation If White 1 and 3, Black lives in the corner with the moves to 8; his invasion is a success.

Giraerseeran @

Teaseaeeeoe Fi

68. Correct Answer

White 1 is good timing. If Black

There

||

ue 2

|

Variation are times when

Black

2, his thickness facing the bottom is

might want to block with 2, but the

negated by White’s marked stone. Next, Black can play at ‘a’, ’b’, or ‘c’.

black stones are left with a heavy shape.

|

Part Two: Invading Corner Enclosures stanstatanatatanstasacatatecaectaStatatatatatatseaPaM tANNTaTSTTSTALGMIN TE STALAESTARLETS TENATOPETUTTER TTAMADARTONPOPANSTSUESRATGPSRUNSTEPPATESTAEAETEREPEPAIETETSYYSTESD TATETSREPYOTSA T PCTMNO TSLSPENA NSTROPPO

TESTE

EEE

ATT

Problem 69. White to play

EEE el ei =|| eet This time Black pulls back with 2 in answer to 1. What should White do?

Problem 70. Black to play

If White defends with 1, Black has a brilliant tesuji to destroy White’s corner. Where is it?

Problem 71. White to play

Black blocks with 1 and 3. What should White do now?

an

oe

Part Two:: Invading Corner C Enclosures

Se

ee

DDDDOE Th ie EHO 90g OHotele Per fe : EERE

srt Hosts BET

Failure White 1 is a heavy move. After

69. Correct Answer

White should lightly jump to 1 and, if Black plays 2, jump again to 3. White can later threaten Black with ‘a’. White must not play 1 at ‘b’ because Black 2 will kill him.

70. Correct Answer Black 1 is a spectacular move. If

3, Black 4 to 8 will leave White with

only one eye. With Black 10, White is under attack and he must now find his second eye in the center

White plays 2, Black 3 threatens to

Variation If White connects with 2, Black can live with 3. White’s corner ter-

link up with ‘a’ or ‘b’.

ritory is completely destroyed.

annea ste 6

a

SPeES

HE.

ia

71. Correct Answer White should cut with 1. He can then live in the corner in sente with the moves to 7.

Failure

If White simply plays 1 and 3, Black connects with 4. White lives with 5, but he ends in gote.

=='5 2

Part Two: Invading Corner Enclosures EA

remnant an Rhett erate aneteeter

TMANTESTE

MUP TA PANANASLRATERATANANAESNETARANSEEEUAE TARTONSTANT ANATAPOTAPORATAT ANAT ATAYATSTATGZSTAMGNS TONALTANATANTETARE TASSTAMAS ERATSTEASTANA ANAMS TANTS TANAEU APL TSNANAEAN

Problem 72. White to play

ect ect

HELOH ote EE Hee HO

EE

tpi

||

This time, in answer to White 1, Black draws back into the corner with 2. How should White continue?

Problem 73. Black to play

Where should Black invade White’s position on the right?

Problem 74. White to play

Black has omitted 8 in the correct answer of Problem 71. How should White continue?

=,

Part Two: Invading Corner Enclosures TATU ATTATARARATCTANAEATANAMATITA

EASA EATATRAN TAPATALANASEEATAEATATANITAA TATED

MMT UTEP

Z bail= 2

72. Correct Answer White should jump all the way to 1. If Black caps with 2, White attaches with 3.

73. Correct Answer Black 1 aims at White’s enclosure on the right. If White defends with 2, the moves to Black

5 are the normal development.

74. Correct Answer

White first exchanges 1 for Black 2, then jumps to 3. Black is now separated into two weak groups.

Continuation If Black blocks with 4, White plays the moves to 9. Black’s moyo has been wiped out.

Variation

Black 1 is also a vital point. White will answer with 2 and Black attacks the white stone on the left with 3.

Failure If Black jumps to 2, White attaches at 3. If Black ‘b’, White ‘a’

captures the black stones on the

right.

eee 5! es

Part Two: Invading Corner Enclosures sittin iatinrnnnen ttt

htt

ttt

stata PERAPTSESDGBANSRaTSRUeSTGM

NAAM SEITSETAE T TA PTTRSTALA SPN LETTE BRETT

AIG Ta TIPPS MPT OITA

a atatatatatatatatatatatsttatatatatanatet

Problem 75. Black to play

White 1 is a bad move. How does Black punish White?

Problem 76. Black to play

After Black 3 in the variation diagram of Problem 73, White attaches with 1. How does Black respond?

Problem 77. Black to play

Invading at 1, the 3-3 point, when Black has a stone on the star point, is

usually the vital point. In which direction should Black block? ee | ee

Part Two: Invading Corner Enclosures

ae EB

ee Oo

75. Correct Answer Black should attack with 2. White’s stones are heavy, with no

also bad. Black solidifies the ter-

room to expand. White cannot

ritory at the top with 2.

White’s Failure

Erasing Black’s moyo with 1 is

make sabaki as in Problem 66.

LELeosesoeeaoee sail Cali it ry Oe. Saeaeee

ue 76. Correct Answer Black should draw back with 1. Next, the moves to Black 7 can be

expected.

77. Correct Answer Black should block at 2 and extend to 4 to make a box-like terri-

tory on the left.

55h

HE i

Variation Black 1 and 3 are a bit inelegant, but they are playable. The moves up to White 10 are one variation.

Continuation

Blocking from this side with 2 results in the joseki up to 12, but it leaves Black with a shallow moyo.

_Part Two: Invading I Corner Enclosures sataNaNGNaTaNaSs tatataPatstatASATATUNG NAAAAEENATATANAMATANTAVARASHANATTA

NANGUSE VONGTATATATTEEATSTUTL ES EG TSTATATORURUTA TABNAEUAAAS ETAT NATSERTET

Problem 78. Black to play

White has made wide extensions from his corner enclosure at the top right. However, White’s position is thin and vulnerable. Where should Black invade?

Problem 79. Black to play

Suppose White answers the invasion of Black 1 with 2. How does Black continue?

Problem 80. White to play

After Black extends to 1, what should White do?

cae: ee

Part Two: Invading Corner Enclosures ast tataEtta ASRAREPS NIMETTR

ssatatatanaes tatetanstaNatetatstaNaNs TETANUS

78. Correct Answer Black 1 is the correct invasion

point. If White jumps to 2 and 4, Black follows him into the center with 3 and 5.

79. Correct Answer Black exchanges 1 for White 2, then caps with 3. Black’s moves flow very beautifully.

ao

atatatatanaratatatstatatetatitit

LANGA TTT

ALTE

Variation White might also attack with 2. Black would then attach at 3 and, after 5, jump to 7. If Black 3 at 7, White would attack at ‘a’

Variation White could answer 1 with 2

and jump to 4. Black would then play 5, followed by White ‘a’. If the ladder is favorable, Black would atari at ‘b’ and at ‘d’. White could also answer 5 at ‘c’, but his shape in the corner is full of holes.

Hy

80. Correct Answer There are two correct answers.

Crawling with White 1 here is the first one.

oe

et |

Variation

The knight’s move of White 1 is the other answer. White 1 at ‘a’ is a mistake.

roe

Part Two: Invading Corner Enclosures sasetatatatareTAtENMTETtAAaTA Maton

PaAaRaT RSTANGTARAIASNATATATG

PANAMA ATANANAELTANA TaAPSTARANANATa TAsWALATAPGNORS TVSVELATSNAMGRASE TACAYSYLDARUTA EECPARASUTO TN CATSTANSTOPATS

HAEQPAAAEATA TSTMANADDANESTAEEN ETAT

Problem 81. Black to play

ore eeeTS erh How should Black answer the hane of White 1?

Problem 82. Black to play

White pincers the marked black stone with 2. If you've never seen it

before, Black’s next move might surprise you.

Problem 83. Black to play

As mentioned in Problem 80; White 1 is a bad move. How

punish White? Pay ce

does Black

_Part Two: Invading Corner Enclosures Steerer

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81. Correct Answer The hane of Black 2 is the best response. After White connects at 3,

Black makes shape with 4 and 6.

82. Correct Answer Black 1 is an interesting move. There are other moves, such as at-

taching at ‘a’ or ‘b’. However, you should not neglect to learn the variation starting with Black 1.

Failure

If Black immediately draws back with 2 here, White will descend to 3. This result is better for White than the one in the correct answer.

aes Simply jumping out with Black 1 lets White defend the corner with 2. This is a steady move and there are no longer any weaknesses in White's position.

HEH

alg

Black plays 1 and 3. If White ’b’, Black ataris at ‘a’, then catches a stone in a ladder with ‘c’, confining White to the corner Black also gets

Failure Cutting below with 3 is a mistake. White ataris with 4 and will get a ponnuki along the side. See the next problems for the continua-

a thick wall. White 4 at ‘a’ is bad.

tion.

83. Correct Answer

pen ee

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Problem 84. Black to play

White’s three-space extension from his corner enclosure is ideal. However, Black has a strong position on the left. How should Black invade?

Problem 85. Black to play

Against the shoulder hit of Black 1, White responds with 2. What should Black do now?

Problem 86. White to play

Black aggressively blocks with 3. How should White answer?

safle

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84. Correct Answer Black should invade at 1. If White jumps out with 2, Black escapes into the center with 3.

Failure Attaching with 1 and trying to escape with 5 and 7 is not good. Black’s shape is destroyed when White plays 6 and 8.

85. Correct Answer Black 1 is a brilliant move. However White answers, Black has an effective continuation.

Failure Forcing with Black 1 and 3 is unimaginative. White’s corner territory becomes large and impregnable after White descends to 4.

86. Correct Answer White should atari with 1 and 3. This is the same as the failure

Continuation Black captures two stones with 1 and 3. Black could also atari at ‘a’

diagram in Problem 83. White could also play 1 at ‘a’, but this is a dif-

with 1. Either way, White will have no problems.

ficult variation.

peer, ake

Part Two: Invading Corner Enclosures EERIE

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Problem 87. Black to play

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HEE srralaisiaie || hetalalele yah

What should Black do when White tries to enclose the marked stone

with the diagonal move of 1?

Problem 88. Black to play

TRS Srasatanecti PRS EEREEEEEEEEEEEE Cina

Seaas

White draws back with 2 in answer to Black 1. How does Black play next?

This is a continuation of Problem 86. How should White play? oe

ee

Part Two: Invading Corner Enciosures

87. Correct Answer Black should answer with 1. If White continues with 2, Black

Failure Black 1 is a bad. White confines the black stones to the top with 2

pushes through and cuts with 3

and 4. If Black plays 3 at ‘a’, White

and 5, then jumps to 6. White can-

‘b’-Black

3-White

‘c’—Black 4-

not push through at ‘a’ because of | White ‘d’, and Black’s stones are althe aji of 5. most dead.

88. Correct Answer Failure Black should make shape by If Black rushes to play 1. White jumping to 1. If Black gets to play _ strikes at 2. Clearly, this is the vital at ‘a’ later, he will have made a __ point of the whole position. wonderful shape.

w fo |_|

| Bee 89. Correct Answer Pushing up with 1 is the vital point.

ee

Continuation Black blocks at 2. If the thickness White gets on the right side is worth the territory Black gets at the top, he may play 3 and 5.

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Problem 90. Black to play

Continuing from Problem 87, White defends at 1 and jumps to 3. How should Black answer?

Problem 91. Black to play

What does Black do if White answers 1 with 2?

Problem 92. White to play

Black 3 is an overplay. How does White take advantage of it?

=

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rari &

fees

Hea 90. Correct Answer Black should simply jump to 1 and, after White defends the right side with 2, play the diagonal move of 3.

91. Correct Answer

Wrenching the corner territory away from White with 1 is the natural move. Next, White attaches with 2. Black’s invasion is a success.

BAe a8 Gh

Variation Black could also attach at 1. If White 2, Black and White move down the side with the moves to 7. White’s stones on the left now fall in the shadow of Black's thick wall.

Failure If Black draws back with 1, White takes the corner with 2 and

Black’s shape has been destroyed.

PERSE TpABS ELE OO GLa sna oS BO @) ©

92. Correct Answer White should descend to 1. If

Black ‘a’, White will play ‘b’, capturing two stones in the corner.

Black's Failure If Black saves his corner with 2, White turns at 3. After 4, White

ataris at 5, threatening to capture a stone at ‘a’ or four stones at “b’.

ees

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Part Two: Invading Corner Enclosures

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Problem 93. Black to play

HPSS SEee cD JGR Ree Sees aae This time White caps the marked stone with 1. How does Black answer?

Problem 94. Black to -

White answers Black 1 by blocking at 2. What should Black do?

Problem 95. White to play

Instead of an atari at ‘a’, Black might atari from above with 1. What should White do?

as 4 Pee

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93. Correct Answer White's Failure Black should poke through the If White tries to take advantage hole with 1. Black’s shape looks __ of Black’s bad shape with 1 and 3, bad, but White is unable to counter

Black lives with the moves

effectively.

Black now has moves at ‘a’ and ‘b’.

94. Correct Answer Black 1 is the vital point.

to 10.

Failure Of course, Black would like to

play at 1, but he cannot do so unless he has played 1 in the correct answer. Now White takes the point 2, and Black’s shape has collapsed.

H 95. Correct Answer

Failure

White should capture with 1. If

If White connects with 1, Black

Black ataris at ‘a’ next, White will

will take the corner with 2 and 4.

connect.

Compared to the joseki in Problem 86, this is a failure fer White.

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_Part Two: Invading (Corner Enclosures SPSTETATEMSRASMART MNT

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Problem 96. Black to play

SETEErSNCSEMTE

Aaa HOS BEL ia -@ @| | | @t | Bo Nee iB bz eee Pe |

EEC et

White defends the corner with 1. What is Black’s response?

Problem 97. Black to=

What should Black do after White answers Black 1 with 2? Show the next three moves.

Problem 98. White to7

eis 4 Hee =

avaue PCA a As we saw in Problem 80, White 2 is the correct response to Black 1. If Black now blocks with 3 and 5, what should White do? eo

_ Part Two: ; Invading (Corner Enclosures _ RR AANRMARTT PANEUALTEEN

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White 2, then plays on the vital point of 3, attacking the two white

Continuation Both White and Black must now move into the center with the moves from 4. After 9, however, it is

stones.

Black who has the better position.

96. Correct Answer Black first exchanges

1 for

T

97. Correct Answer This problem is probably too easy. Playing atari is obvious, and it is common sense to make shape with 3.

Failure Black 3 is a false tesuji. White answers by jumping to 4, but later White will come back and play ‘a’. At this point Black will wish he had played at ‘b’, the vital point in all these variations.

ie

tee a

HE C HE a : if 98. Correct Answer There is no other way but to atari with White 1 and 3.

Failure

If White timidly connects with 1, Black connects with 2 and his thickness on the outside is overwhelming.

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Problem 99. White to ad Ot

After the exchange of White 1 for Black 2, Black's position looks very strong. However, there is a way for White to launch a successful invasion.

Problem 100. Black to play

This time White solidly connects with 2 after Black 1. How does Black respond?

Problem 101. White to play

After White 3 in the correct answer of Problem 98, Black 1 is the vital

point. If White blocks at ‘a’, Black will atari at ‘b’. What should White do? aa, ee

_ Part Two: Invadinng (Corner sa)nclosures ra tavatatatarattanatsturatstatetansrse Netatat

99. Correct Answer

MULTAN NTELENTA UTE ETT

Variation

White 1 is a tesuji. If Black cuts

If Black plays 2, White can live

at 2, White crosscuts with 3. Next, if Black ‘a’, White ‘b’; if Black ‘c’, White ‘d’. White has succeeded.

in the corner with a ko by playing the moves to 9.

100. Correct Answer

Again Black 1 is the vital point. Black’s success can be measured by

Failure Of course, Black would like to play 1, but White would then hit

the fact that his three marked stones have forced White to make

him at the vital point of 2, destroying his shape.

three submissive moves, shown by the three marked white stones.

101. Correct Answer

Failure

Capturing with 1 leaves White with good aji. Black gets to play

1, but Black ataris with 2. Black is

forcing moves

putting all his stones to good use.

with 2 and 4, but

this can’t be helped.

G9)

White could also respond with

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Problem 102. White to play

Lely te)

After Black 1, White reinforces his stones in the center with 2. How

shoutd Black continue his operations in the top right?

Problem 104. White to play

White flattens Black’s moyo at the top left by exchanging 1 for Black 2. How should White continue? ty

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102. Correct Answer The hane of White 1 is the correct move. If Black 2, White lives in

the corner by extending to 3.

103. Correct Answer

Black should push through and cut with 1 and 3. However White responds, Black will gain an advantage.

:

Variation If Black takes the corner with 2,

White ataris with 3 and connects with 5. Black gets the corner, but White has invaded the right side.

Failure Black suffers a loss if he cuts on the other side with 3. The reason will become clear in the next few

problems. White ataris with 4.

t

104. Correct Answer

It is urgent for White to invade at the 3-3 point with 1. If White neglects to play here —

Black will add another stone at

1. All the territory in the top left part of the board will become Black's.

aes) oe

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Problem 105. Black to play

The small-knight enclosure secures the corner, but if Black has built

strong positions around it, an invasion is possible. Where should Black invade?

Problem 106. Black ia to

White answers the cut of Black 1 with 2. What should Black do now?

Problem 107. White to play

HORE SEETHOEE

Against White’s invasion, Black blocks with 1. How does White respond? 5s.

Part Two: Invading Corner Enclosures a ATATANANAMASENAETATANATATATEPATATAAUTATATETANITUTIT

105. Correct Answer Black 1 is the point to gouge

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White's Failure White might respond with 4

out White’s base. Up to 13, Black

and

6 here.

However,

after he

lives in the corner After 15, however, White’s group is eyeless and will become a target of attack.

—_ defends with 10, Black cuts with 11 = and White’s position collapses.

106. Correct Answer Black should play 1. White has no choice but to atari with 2, Now

Failure Black 1 also makes shape, but _after White 2, there is no play left

Black can make good shape by _for Black in the corner. See the next playing atari with 3. If White plays —_ problem for amplification. 2 at 3, Black plays at 2, and the white stones will be captured.

107. Correct Answer White 1 is the correct answer Black confines White to the corner

Failure White 1 is a bad move. Black blocks with 2 and, after 6, White

with 2, but White lives up to 7.

has no room to make two eyes. Fe

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Problem 108. Black to play

Where should Black attack White’s moyo at the top?

Problem 109. Black to play

White captures with 1. What should Black do now?

Problem 110. White to play

In answer to the marked white stone, Black plays 1. How does White respond to this move?

Part Two: Invading Corner Enclosures SURAT RGA RARASPET NTA

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108. Correct Answer Black 1 is the vital point. If White 2, Black forces with 3, then

jumps to 5. Black has made a light sabaki boa

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TER

TTT

ATP NAPPATETANUSLEE

Variation If White defends the corner with 2, Black will play 3, and the lone white stone on the left will come under attack.

@

e

109. Correct Answer Black should play 1 and 3, then leave the situation as it is. If White 2 at 3, Black plays at 2 and White collapses. After 4, Black ‘a’ (or ’b’,

Failure Simply playing Black 1 is lukewarm. White plays 2 and there is no longer any danger to his stones in the corner.

threatening ko) could later become double threats against the white group on the left and the right.

110. Correct Answer White 1 makes good shape. If Black ‘a’, White plays ‘b’.

Failure White can live with 1 here also,

but it is not good. White's territory in the corner is small.

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Part Two: Invading Corner Enclosures retatatatetenteteteunrattitatantat nat

Problem 111. Black to play

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White’s extension is one space narrower than in Problem 108. Where should Black invade?

Problem 112. Black to play LORE

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TOS

To avoid the threats in Problem 109, White plays 2. What is Black’s response.

Problem 113. White to play

Black ataris with 1, then connects with 3. How should White play? ae; /:ae

Part Two: : Invading Corner Enclosures

111. Correct Answer Black 1 is the vital point. We will look at the variations in the next few problems.

Variations

Black could also peep at 1. However, Black 1 in the correct answer is the usual move. Attach-

ing at Black ‘a’ is also possible. eo

112. Correct Answer Black ataris with 1 then makes the nose attachment of 3. If White ’, Black presses from above with a’.

‘

|

Variation Black may not want to play the moves in the correct answer immediately. He could first jump to 1 to eliminate any danger to his group. After that he plays 3 and 5, looking on these as forcing moves.

CA

113. Correct Answer Jumping to 1 is correct. After Black 2, White plays in the corner with 3 and, after 5, he is alive.

Rh

Failure

If White simply extends to 1, Black kills him with 2.

Part Two: InvadingCorner Enclosures LARGER ANNAN AE LCST TLE

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Problem 114. Black to play

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CEPR BaP

oeseeS

How does Black answer the diagonal move of White 1?

Problem 115. Black to ihe ere ee

es

SECC rue In answer to Black 1, White plays 2, hoping that Black will submissively answer at ‘a’. How does Black take the initiative in this position?

Problem 116. White to Se

After Black 4, White can’t live unconditionally. Where does White play

to get a ko?

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Part Two: Invading Corner Enclosures ANAT

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114. Correct Answer Black hits the vital point of the one-space enclosure with 1, then lives with the moves to 11. Instead of 11, Black could also play at ‘a’.

Variation Black 1 is a move for special situations. White answers with 2, and Black expands with 3.

115. Correct Answer Black should play 1 and

aiming to attack the white stones

Continuation If White defends with 1, Black forces with the moves to 6, then

with ‘a’.

jumps to 8. Black has made a

3,

beautiful sabaki.

116. Correct Answer The only move for White is 1. After Black 2, White must pin his hopes on a ko by playing 3.

Failure If Black 2, White can live un-

conditionally with 3 and 5.

Pen ee

Part Two: Invading Corner Enclosures MAUBUUBLUEMAEANEDTTT

Problem 117. Black to play

In answer to Black1,

Black respond?

Problem 118. White to play

Black's position at the top right is vulnerable. Where should White invade?

Problem 119. White to play

This position often occurs in games and we are going to analyze it extensively. Where is the best place for White to invade?

Ca

ee

Part Two: Invading Corner Enclosures staatatereratatattrtataaNRts tt AEE TTI

117. Correct Answer Black makes life in the corner with the moves to 11. White must

now defend against the cut at ‘a’.

Variation When Black plays 3, White could connect at 4, but Black 5 be-

comes a tesuji. Black could also play 5 at ‘a’ first, then come back and play at 5.

Variation

118. Correct Answer

White 1 is the vital point. If Black 2, White lives with the moves to 7.

If Black blocks with 2, White

will play 3 and 5. Since White has the cutting point of ‘a’, he can live.

t

119. Correct Answer If you want the corner, White 1

at the 3-3 point is the place to play.

Variation Invading on the side with White 1 is also correct.

fies

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Problem 120. Black to play

What does Black do if White attaches with 1?

Problem 121. White to play

How should White invade the black position on the right side?

Problem 122. White to play

Black 1 is a tight move. Where should White play next? Re

; Part Two: 5 Invading

Corner Enclosures tRNA

120. Correct Answer

MAARTEN TETANTANTAMANA MNT UTATART SETESIGT

Failure

Wedging in with 1 is the correct

Playing hane with 1 is a bad

move. After 3 and 4, Black extends

move. After White 8, the black stones are dead.

all the way to 5.

121. Correct Answer This time, instead of the 3-3

point at ‘a’, White should invade by attaching with 1. White could

The

Continuation moves to White

7 are

joseki. White has succeeded in invading Black’s moyo.

also invade at ’b’ or ‘c’.

122. Correct Answer White should play 1. The moves to Black 6 are a well-known joseki. White 5 at 6 would be disastrous for White.

Variation Black could also play 2 and 4. The point ‘a’ is left for the endgame. Both these variations are satisfactory for White.

By pee

PartTwo:; Invading (Corner Enclosures tttatatataneranasitatstetaaRAtSTOTAT ATAAPANTAMA TAPNNTETATAN NETTUNO

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Problem 123. Black to play

How does Black respond when White bumps into his stone with 1?

Problem 124. White to play

In answer to White 3, Black descends to 4. How should White respond?

Problem 125. White to play

Black 1 is a strong response to the invasion by the marked stone. Black intends to give White the corner and attack the right side. What is White’s next move? BS : e

123. Correct Answer

Failure

Black 1 is the vital point. Black

Black can live by drawing back

lives with the moves to 7. Black now aims to cut at ‘a’. If White 2 at

with 1, but he has a smaller life, and doesn’t leave weaknesses in

7, Black plays ’b’ and he can break through White's wall.

White’s position.

Hecsaaicostit Hecaaaitaceay EERSEEASaRERee

124. Correct Answer

Continuation

The knight move of White 1 makes good shape.

Defending with Black 1 is the proper move. White can now complete his shape with 2 and 4.

cite fH

T

125. Correct Answer Peeping at White 1 is a tesuji. As you will see in the next diagram, White 1 at ‘a’ is not good.

Sig

Failure

Black 2 is a good response to White 1. If White ‘b’, Black plays ‘a’ and takes the corner. If White draws back to ‘a’, Black blocks at ‘b’, White ‘c’, and White gets a small life. White’s result is bad.

_Part Two: ; Invading Corner Enclosures MUTI UN ETAT atatat tata Ta Nanterre

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Problem 126. Black to play

This time the white enclosure is facing the other direction. Where should Black invade?

Problem 127. White to play

After White plays the marked stone, Black pushes down and cuts with 1 and 3. What should White do?

Problem 128. White to play

Connecting with Black 1 is ‘an obvious move. In response, White has

two possibilities. Where are they? eek GOne

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126. Correct Answer

Invading at 1 is the vital point White 2 is the standard response. Next, Black attaches at 3 and, after

Bea

Variation If White defends from the other side with 2, Black attacks the lone white stone with 3.

5, jumps to 7. Instead of 3, playing directly at 7 is also possible.

127. Correct Answer Black should atari with 1, then attach at 3. After Black 6, White

Failure If Black ignores White 3 and immediately goes after the two white

makes shape by jumping to 7.

stones with 4, White plays 5 and 7,

re

isolating the black stone at the top.

128. Correct Answer White can play either 1 or ‘a’. Both of these moves are joseki.

Failure

Connecting at 1 is heavy. Black plays 2 and, after 3 and 5, kills White with 6 and 8. White 3 at ‘a’ is better; he just manages to live.

2005

Part Two: Invading Corner Enclosures sesatataratanscanatatatatetitars a2

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Problem 129. White to play

The shape of the black stones is called the ‘three crows’. This is a very solid formation, but it is still vulnerable to an invasion if White has built up strong positions in the vicinity. Where does White invade?

Problem 130. White to play

acar°-

After White plays the marked stone, Black attacks with 1. How does

White handle this move?

Problem 131. White tope

Against White 1, Black 2 is a strong move. How does White live?

oy

_Part Two: IInvading Corner Ce Enclosures Nat TANG PA MAAS STAEANATAATAAETATANN TATTSTAALS TEVA

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129. Correct Answer

Variation

White 1 is the vital point. Black 2 is the severest response. After 10,

If Black 2, White easily lives with the moves to 11.

White cuts with 11, and the life or death of the stones in the corner

depends on a ko starting at ‘a

130. Correct Answer Attaching at 1 is the correct move. White makes sabaki with the moves to 5.

131. Correct Answer

Connecting at 1 is the proper move. After Black blocks with 2, White lives with 3.

=O)

Variation

If Black tries to push through with 2, White stops him with 3; Black must connect with 4. Next White connects at 5. This result is not at all bad for him.

Failure Connecting at 1 is bad. After White 3, Black kills him with 4. If White 3 at ‘a’, he lives, but Black can capture a stone in sente with 3. ==

Part Two: Invading Corner Enclosures

Problem 132. White to play

In answer to White 1, Black 2 is also a strong move. If White next plays ‘a’, Black can make life with ‘b’. So how should White play?

Problem 133. White to play

This time Black responds to the marked stone by blocking from the outside with 1. What is White’s response here?

Problem 134. White to sa

The moves from White 1 to Black 4 are a joseki. What is White’s next move? There are two correct answers. 299:

Part Two: Invading Corner Enclosures

132. Correct Answer

White plays 1, forcing Black to connect at 2, Now White can hane at 3 and live with the moves to 7.

133. Correct Answer Playing hane underneath with 1 is the proper move.

134. Correct Answer 1 The hane of White 1 is the usual answer. Black cuts with 2 and White connects with 3. Next, Black

will play at ‘a’, taking the corner, and White will play at ’b’.

Failure for Black. Black 2 is an overplay. White cuts with 3, and gets the advantage in the capturing race that follows.

Variation

play 1.

White

could

also live in the

corner by playing 1. The exchange of 2 for 3 is important. After this, White will aim to cut at ‘a’.

mans tenses

Part Two: : Invading Corner Enclosures SUSTAIN LATA NANT AIET

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Problem 135. ore tocea

The moves from White 1 to Black 4 have been played. White would like to play ‘a’—Black “b’-White ‘c’, but Black would then play a tesuji at ‘d’, capturing White's stones in the corner How should White play?

Problem 136. White to play

Black answers White 1 by connecting at 2. What is White’s next move?

Problem 137. White to play

This time Black responds with the diagonal move of 2. What should White do in this case?

on:

Part Two:— PREETI T NSSRENTERS AA ATA LEAMATNT

Corner] nclosures a

135. Correct Answer White 1 is the vital point. If Black defends his weakness by playing 2, White lives in the corner

with 3 and 5.

Failure for Black. Black 2, trying to kill White, is a bad move. White plays 3 and cuts with 5, winning the capturing race in the corner by one move.

ate ieie cH THe

tees 136. Correct Answer White 1 is the best move. If Black blocks with 2, White lives in the corner with 3 and 5.

Variation If White plays 1, Black blocks at 2. In certain positions White 1 could be a good move.

137. Correct Answer

Variation

In this case, the knight move of White 1 is the only way. This move was criticized in Problem 125, but in this case it is good.

If White plays 1 and 3, the sequence continues up to 8. If White connects at ‘a’, Black plays at ‘b’. If White ‘c’, Black takes the corner with ‘a’. Either way, Black ends up with a thick position.

S06

_PartTwo: Invading (Corner Enclosures _ statatanarstasatatatatasatatantatatatatatatatatatataeata ttt

tata ratate

How does White respond to Black 2?

Problem 139. White to play

How does White respond to Black 1?

Problem 140. White to play

How does White respond to Black 1?

wae,

Part Two: Invading Corner Enclosures SPSTOMAHTE VATANAMETARAP PANANATATAMAISTETALSPETEET ATATOTSAANTT NO TOTAPIRYAMETE "TANG STEPATAPASATTATGTOTA UIST TOPS MATITATSNAUATS PATON ETFSMONAT

138. Correct Answer The diagonal move of 1 gives White good shape. If Black ‘a’, White plays ‘b’, easily making life in the corner

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Failure White 1 is a bad move. Black plays 2 and gets a solid shape. After this, White must play ‘a’—Black ‘b’— White ‘c’, and he can only live in

the corner by winning a ko.

fa

HE

139. Correct Answer White first forces with 1, then

jumps lightly to 3.

140. Correct Answer White 1 aims at ‘a’, so Black

must defend with 2. Next White extends to 3, ending the sequence with good shape.

Failure Jumping to 1 first allows Black to block with 2 in sente; he now threatens to play ‘a’. This is a setback for White.

Failure for Black Black 2 is unreasonable. White pushes through with 3 and 5, win-

ning three black stones in a capturing race.

== 93=—

Part Two: Invading Corner Enclosures Mtantatatanatotatareratits attatatatstatatatatat TANT TTT AnItenetatutaT tat

Problem 141. White to play

How does White invade the corner?

Problem 142. White to play

Black takes the corner with 1 and 3. What should White do?

4.408 or.

Problem 143. Wh

ite to play

Black’s position here is much tighter Where should White invade?

_Part Two: Invading Corner Enclosures TATE

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141. Correct Answer White first peeps at 1. Black must defend at 2 to avoid being confined to the corner White then invades at 3.

142. Correct Answer White should cut with 1 then atari with 3. After Black takes the corner with 6, White makes sabaki with 7 and 9.

oa 4 143. Correct Answer

Invading with White 1 is a good move. If Black defends the corner with 2, White links up with 3 and 5. A direct invasion at ‘a’ is also possible.

NATASHATTDTET TET

Continuation After White 1, the moves to Black 8 are inevitable. White is satisfied because his stones on the

right have become strong.

Variation

Black extends to 6, aiming to get thickness in the center However, White takes the corner with 7.

Variation If Black prevents White from linking up on the left by playing 2, White plays on the 3-3 point with 3. With the exchange of 1 for 2 in place, this is an effective move.

— 100—

Part Two: Invading Corner Enclosures

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Problem 144. Black to play

This white formation is is called kannon-biraki in Japanese, meaning double-hinged doors. Such formations are defective and need an addition al move to complete the territory they map out. Where should Black invade?

Problem 145. White toa

The marked black stone does not adequately protect the corner. White still has a way to invade.

pone 146. eae to play

When White invades at the 3-3 point, Black defends with 2. How does White continue? — 101—

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144. Correct Answer When faced with this formation, invading at the 3-3 point and living in the corner with Black 1 is the biggest move. Of course, Black blocks from the wider side with 2.

Continuation White 4 and 6 are the strongest moves, but Black gets six points of territory in the corner after he connects at 15.

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te)atts ie%eg

HEE aa: 145. Correct Answer First White invades at the 3-3 point, then slides to 3, threatening

to link up to the white stones on

:4

OO

Variation

Against Black 2, White 3 is a

light move. Again Black defends with 4, but White lives with 5 and

the left. When Black defends at 4, White lives with 5. If Black 2 at ‘a’, White hanes at 2.

146. Correct Answer

White peeps with 1 and, after Black connects at 2, crawls to 3. Up

Variation White could also live in the corner with 3 and 5. He has more

to 9, White lives in sente.

territory, but ends in gote. — 102—

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ratatatetatatatatatetetatetaNstaestatetEtat MATER ESTA

Instead of playing 14 in Problem 144, White tries to take away Black’s eyes in the corner with 1. How should Black respond?

Problem 148. White to play ee pS.

eee na

ae eee

Black’s formation is very tight. Is it possible for White to invade here?

Problem 149. White to ist!

Here is another tight black formation. Can White invade Black’s corner and live? —

103—

Part Two: : Invading Corner Enclosures PSEtatatatat

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147. Correct Answer Black ataris with 1. White has no choice but to play 2, but after

Black 3, the points ‘a’ and ‘b’ become miai. Either way, Black will live.

STATUE NANUMUTAE PSTCPEE DBP OTN STIEEMRE

Reference Attaching with 1 is not good. White takes the corner with 2 and 4, leaving Black’s stones at 1 and 3 heavy. White can still settle his stone at the by extending to ‘a’

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a

148. White’s reasonable. after Black is dead.

EONUESERATEAATAMTEMS TETSTOT TE

Correct Answer invasion at 1 is unBlack blocks at 2 and 10 it is clear that White

ory

0

Variation

If White

draws back with 5,

Black’s killing move is at 6. From this diagram it is easy to see just how big Black’s territory is.

149. Correct Answer The moves from White 1 to 7

Alternative Since White is unable to invade

are all good, but Black is too strong

Black’s corner, he should make this

here and White has no answer to Black 10.

area as small as possible by playing

=

the forcing moves of 1, 3, and 5. 104

Part Three: Invading Large Territories Problem 150. White to play

Sreetaseatant aiae Black maps out a huge moyo with 1 and 3. It is now urgent that White reduce the size of this moyo. Where is the weak point of Black's position?

Problem 151. Black to play

ssecasesestacioe The black and white moyos divide the board. With one move, however,

Black can break up White’s moyo and wipe out much of its influence. — 105—

Part Three: Invading Large Territories STATAANSYARUTATANaYeTAtATAAANGROTSCAPANATANAT TA TASATANQTA TELGROTATATATATATETETOTATATESSESEAVATATETATATATAN TATCRATE TANATITATETASTI TTNSTATARRTU ET

150. Correct Answer When Black has a tight small-knight enclosure with extensions on both sides, the weak point is at White 1. Depending on how Black answers, White will make sabaki by playing at ‘a’ or ‘b’.

Dia. 1. Not applicable here White plays 1 when he wants to erase the top. In this case, Black would push with 2, then cap with 4. This move is very severe, since it not only attacks White’s two stones, but also expands Black’s moyo on the right. Clearly White 1 is not a good idea in this position. — 106—

’ Dia. 2. The worst move Invading with 1 gives Black a target to attack. Black first pincers at 2, then caps with 4. Black is strong above and below, so it will be hard for White to escape.

Dia. 3. A heavy shape

If White plays 1 and 3, he is left with a heavy shape after Black 2 and 4. White cannot make a full extension down the side because of

the presence of the marked stone. This is a terrible result for White.

Dia. 4. An iron rule move, but Black then eliminates the weak good a is 1 Locally, White

point of his moyo by jumping to 2. When dealing with moyos, the iron rule is: ‘Never let your opponent perfect his moyo.’

407

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Pte OPFert tg nteh a aN 151. Correct Answer Making a large-scale moyo from the 3-3 point is unnatural because Black will land a devastating blow in the center of White's position with 1. White will respond with ‘a’ or ’b’.

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After the moves to 5, Black’s stones are quite resilient and cannot be easily attacked. If White ‘a’,

Black attaches with ’b’.

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Playing one line deeper with 1 is bad because Black will come under a severe attack with 2 and 4.

If Black 1 at ‘a’, White 2 is again the vital point. — 108—

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Problem 152. White to play

Black 2 is the usual answer to the capping move of White 1. White’s next move is common sense, but there are many variations you must consider.

Problem 153. Black to play REn Teese zene

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White makes a large moyo with 1. Black has taken a lot of territory in the three corners, so all he neéds to do is to break up this moyo. Should Black play a light erasing move or attack at the base of White’s moyo?

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152. Correct Answer 8: connects at 3 White should attach and cut

Dia. 1. The vital point, but... Before defending on the right, Black could play on the vital point

with 1 and 3. If Black captures with

with 1. After White 2 and 4, Black

6, White ataris with 7 and, after Black connects at 3, extends to 9. Black defends with 10 and White

This result is better for White than the one in the correct answer. If

makes shape with 11. This is a middle-game joseki.

must go back and defend with 5.

Black omits 5, the aji of White ‘a’ Black 5, White ‘b’ remains.

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—+-+@-

Dia. 2. Black connects If Black connects with 1 in answer to the marked stone, White

ataris with 2. This is a good result for White, but he must be careful where he makes his next move.

Dia. 3. Big profit. If Black is determined to get outside influence, he can play 1 and 3. White gets a big profit at the top. This is not a good result for Black.

— 110—

_Part Three: Invading Large Territories_

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Dia. 4. Don't be afraid of the cut! Don’t be afraid if Black pushes up and cuts with 2 and 4. White makes sabaki with 5 and 7, fully using the marked stone.

Dia. 5. Drawing back Drawing back with 2 is a quiet move. However, after 3, White is satisfied because he has erased

Black’s moyo. Moreover, White can still aim at the extension of ‘a’.

: Dia. 6. Ifthe ladder favors Black If the ladder favors Black, 2 and 4 are strong moves. White would have

to extend to 5 and White would push along at 6. White’s position is not good. However, the ladder favors White here, so he would play 5 at 6 and capture the stone at 2.

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153. Correct Answer: Erase with a shoulder hit. Black is sated with solid territory, so he doesn’t need to fight for more. It

is sufficient just to erase White’s moyo with the shoulder hit of 1. Remember the proverb: ‘When you want to erase, hit at the shoulder!’

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Dia. 1. Joseki The moves to Black 7 are a joseki. After this, White will aim to play at ‘a’ to set up a base from which to attack the right side and

the top right corner

e ‘8TE EE POCO Dia. 2. A successful erasure White could also push up with 2 and 4, then slide to 6. But 7 is a

thick move, giving Black influence throughout the board. Black has successfully erased White’s moyo and his three cornezs are still intact.

— 112—

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Dia. 3. The attachment doesn't work. Attaching at 1 might also be considered. Black hopes to make sabaki with 3, but up to 14, Black’s stones have no eyes and are blocked from expanding by the marked stone. These stones have become a burden on Black.

Dia. 4. Black’s stones are heavy. Drawing back with 3 is also bad. After 7, White invades at 8,

and the black stones are again heavy after the moves to 14. There is a proverb that says, ‘when you want to make sabaki, attach!’ In this

case, the proverb does not ci

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ciisiaauee Dia. 5. An ideal result for White If Black invades at 1, White will attack with 2. All Black can do is to

run away into the center with 3,

eR Dia. 6. on?HH but .. Black 1 is a slow and deliberate way of playing and makes an ideal shape with Black’s two marked

but White continues the chase with

stones. On the other hand, White 2

4. By attacking these black stones,

is also a good point. The result here

White will be able to make territory. This is an ideal result for White.

must be considered even. Clearly, it is better to disrupt White’s moyo by playing the moves in either Dia. 1 or Dia. 2.

— 113—

Part Three: Invading Large Territories atatatinaterateTatctatettetatats mutetnteeeteT TNwtaSesatatate AANALatat8aNATETATLTCPSNI TUTTLE LSETENACITY TITEL EITC

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Problem 154. White to play

The marked stone has been working overtime: White has been able to play two ataris pivoting on this stone. However, the next move is the really important one and, if White misses it, all his good work could go to waste.

Problem 155. Black to play

Rakin?Ae Black has reduced White’s moyo with the moves 1 to 5. Taking the overall position into account, how should Black answer White 6?

— 114—

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Problem 156. White to play

When Black considers the top important, he will play 2. In that case, White will focus his attention on the right side. Try to think a few moves ahead and give White a shape that is not heavy.

Problem 157. Black to play

What is the best way to reduce White’s moyo on the upper right? Is a deep or shallow invasion called for here? — 115—

Part Three: Invading Large Territories (ratarasaner tatatatanaratateteNctATA ANTON MTNA TALTANNIN

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154. Correct Answer: Play lightly When you are trying to make sabaki, you must play lightly. White 1 makes a resilient shape. This is a beautiful move.

ArT©

Dia. 1. Sacrifice some stones There is nothing to worry about if Black cuts at 2. Just atari at 3 and

sacrifice the marked stone. After Black captures with 4, White plays 5 and all of his stones are working efficiently. When you are trying to make sabaki, you have no respon-

Dia. 2. Heavy

White 1 may look like an efficient move, since it protects all the cutting points, but it results in a heavy shape after Black peeps at 2. Because White has tried to save all of his stones, they will all come

under attack.

sibility to save all your stones. All you want to do is to establish a viable presence in the area you are fighting. — 116—

Part Three: Invading Large Territories PAELLA

SESE TESTAMENT

SEITE BST TET RE ETSONPMA

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See nee 155. Correct Answer Black should block at 1. If

White pushes through with 2 and 4, Black builds a huge moyo in the center of the board. Black is now

aiming at the invasion of ‘a’.

Nt N ATS TSAO

APTN

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Dia. 1. Don't blindly play joseki! If Black blindly plays the joseki move of 1, White jumps out to 2, erasing Black’s moyo. Since Black’s moyo is bigger than White’s, the exchange favors White.

This position was taken from the second game of the 3rd Kisei title match, played between Fujisawa Shuko (White) and Ishida Yoshio. When Ishida played 1, Fujisawa probed with 2, then jumped in at 4, thereby avoiding the unfavorable result in the correct answer

— 117—

_ Part Three: Invading Large Territories AUPE TTtANUNTEE

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& _ FEE Black must first play 1, then 3.

_ oH R White 1 is heavy. Black launches

Up to 11, White makes a fine sabaki. Black has solidified his

an attack with 2 and this stone, in concert with the marked stone, will

lower right side, but there still

make it hard for White to get

remains a white invasion at ‘a’

sabaki.

156. Correct Answer

HEH Hte Dia. 2. Without hope If you immediately attach with 1, neglecting to first play at 2, Black will play 2 himself, then jump out into the center with 4. White’s three stones are heavy and almost without hope.

157. Correct Answer

The shoulder hit of Black 1 is the best move. A deeper invasion would be dangerous. After Black jumps out to 5, he has nothing to worry about. One thing you must remember when you make a shoulder hit: expect to end in gote.

— 118—

Part Three: Invading Large Territories SMABSAEMERTAAMOMNAARA STSPIS IT HME

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while Black gets influence. If White 4 at 5, Black would play at ‘a’.

Dia 3. Ideal placement Erasing White’s moyo with Black 1 induces White to play 2, which is ideally placed in relation to his other stones.

Dia. 4. Failure Capping with Black 1 is also dubious. Again White 2 is an ideal point.

Dia. 5. A deep invasion is bad. Because White’s three stones at the top right are so strong, invading at Black 1 is foolish. White at-

Dia. 2. Variation

White could also push up with 2, then slide to 4. White gets profit,

tacks with 2 and 4, and all Black

can do is escape with his stones.

Dia. 6. The invasion is good. If Black had the marked stone in place, then an invasion at 1 might be playable, since it attacks the two white stones on the right.

— 119—

Part Three: Invading Large Territories satatatetatatatettatetetMtENTEEN tat etatataPaPsststat ATTY NTE ATTA ASTTETEET

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Problem 158. White to play

The attachment of Black 2 is a move used in special situations. It is a move contrary to the go principle of not attaching against attacking stones. But in this case, Black’s corner is strong and he is not worried about eyes.

Try to read five moves ahead.

Problem 159. Black to play

This position is similar to the one in Problem 157. However, there are some

differences. These differences should influence the way you erase

White’s moyo.

=