Go (Baduk, Weiqi) problems with solutions

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Direction of play and tesuji problem 023

23 Black to play Please think about how Black should strengthen the territory below.

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[do][dq][ip]
AW[cq][co][cn][cp]
C[23
Black to play
Please think about how Black should strengthen the territory below.]
(;B[er]
TE[1]C[Correct answer
Kosumi 1 gives the best shape. Black then gains the flexible move at A.
See the continuation]
LB[cr:A]
(;W[cr]
C[See the variation]
;B[fo]
C[…If White plays 2, Black closes off the territory below with 3 — a beautiful shape.]
LB[fo:3][cr:2][er:1]
)
(;W[fq];B[eq];W[fp];B[cr];W[br];B[bs];W[ar];B[eo]
C[…Of course White can start a fight with 2 and 4, but Black makes an eye in sente with 5 and 7 and can enter the battle with confidence. Incidentally, White’s shape on the left is far from perfect.]
LB[eo:9][ar:8][bs:7][br:6][cr:5][fp:4][eq:3][fq:2][er:1]
))
(;B[dp]
BM[1]C[Wrong answer
See the continuation]
;W[gp]
C[…After the simple connection 1 White starts a favourable fight with 2.]
LB[gp:2][dp:1]
))

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