Go (Baduk, Weiqi) problems with solutions

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Life-and-death problem (tsumego) 034

34 Black to play Kill the white group (the first move is the key to destroying White’s eye shape)

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[ab][hb][hc][jb][hd][gd][bc][bd][cd][dd][ed][fd]
AW[bb][cb][cc][dc][ec][fc][gc][gb][ha]
C[34
Black to play
Kill the white group (the first move is the key to destroying White’s eye shape)]
(;B[fa]
TE[1]C[Correct answer]
(;W[ga]
C[See the variation]
;B[eb];W[ba];B[da]
C[…Black 1 is the vital point for destroying the eye shape of the white group. After Black 5, the white group has no eyes.]
LB[da:5][ba:4][eb:3][ga:2][fa:1]
)
(;W[ea];B[da];W[eb];B[ga]
C[…If White 2, Black answers 3 and 5; the white group dies.]
LB[ga:5][eb:4][da:3][ea:2][fa:1]
))
(;B[eb]
BM[1]C[Wrong answer]
;W[ba]
(;B[fa]
C[See the variation]
;W[da];B[ga];W[ea];B[ia];W[fb]
C[…Black 1 is a mistake. White makes two eyes with 2-8.]
LB[fb:8][ia:7][ea:6][ga:5][da:4][fa:3][ba:2][eb:1]
)
(;B[da];W[fa]
(;B[ea]
C[See the variation]
;W[db]
C[…If Black plays 1 and 3, White makes seki with 2-6.]
LB[db:6][ea:5][fa:4][da:3][ba:2][eb:1]
)
(;B[db];W[ea]
C[…If Black plays 5, White answers 6. This also ends in seki.]
LB[ea:6][db:5][fa:4][da:3][ba:2][eb:1]
))))

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