Go (Baduk, Weiqi) problems with solutions

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Life-and-death problem (tsumego) 033

33 Black to play Make life for the group (the first move must take the vital point)

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[bb][cb][db][ec][fc][gc]
AW[ab][bc][dc][cc][hb][hc][hd][ge][ed][de]
C[33
Black to play
Make life for the group (the first move must take the vital point)]
(;B[ea]
TE[1]C[Correct answer
Black 1 is the vital point for making two eyes.]
)
(;B[gb]
BM[1]C[Wrong answer]
;W[ba];B[ca];W[ea]
C[…Trying to expand the eye space with 1 is a mistake. After White 2, Black fails to make two eyes.]
LB[ea:4][ca:3][ba:2][gb:1]
))

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