Go (Baduk, Weiqi) problems with solutions

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Tsumego: capture the stones 072

72 Black to play

How can Black kill the white group?

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
AB[sb][rc][qd][re][pe][nd][ne][nf][mb][mc][kb][jc][jd][je][ob]
AW[lb][kd][ld][md][kf][mf][mg][nb][nc][oc][pc][qc][qb][rb]
C[72
Black to play
How can Black kill the white group?]
(;B[ma]
TE[1]C[Correct answer]
;W[kc];B[ka]LB[ka:3][kc:2][ma:1]
)
(;B[lc]
BM[1]C[Wrong answer]
;W[kc];B[la];W[oa]LB[oa:4][la:3][kc:2][lc:1]
))

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