Go (Baduk, Weiqi) problems with solutions

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Group survival problem 058

9 Black to play

(;
GM[1]FF[4]VW[]AP[goproblems.ru]
SZ[19]
ST[1]
AB[qb][qc][pc][oc][nc][nb][nd][pd][pe][oe]
AW[rb][rc][ma][mb][mc][md][oa][qd][qe][qf][pf][of][nf][ne]
C[9
Black to play]
(;B[pa]
TE[1]C[Correct answer]
)
(;B[na]
BM[1]C[Wrong answer]
;W[qa];B[pa];W[pb]LB[pb:4][qa:2][na:1]
))

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