Go (Baduk, Weiqi) problems with solutions

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Life-and-death problem (tsumego) 001

1 Black to play Save the five stones (show three moves)

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[eb][ec][ed][dd][fd][gb][gc][ic][bc][cc]
AW[bb][cb][db][dc][ea][fa][fb][fc][gd][ge][cd][ce]
C[1
Black to play
Save the five stones (show three moves)]
;B[da]
TE[1]C[Correct answer
Black starts with the sacrifice 1, an important move.
See the continuation]
;W[ca];B[ga]
C[…Black lives by capturing four white stones with an oiotoshi.]
LB[ca:2][ga:3]
)

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