(;CA[gb2312]AB[rc][rd][pd][od][nc][nd][mb][lc][qe]AW[na][nb][oc][pc][qb][qc][rf]
[pf][qf][nf][me][md][kd][ke][jc][kb]C[Black to live]AP[MultiGo:4.4.4]SZ[19]AB[rb]
MULTIGOGM[1]

(;B[ob]C[Answer];W[oa];B[qa];W[mc];B[pa];W[pb];B[ra];W[lb];B[qd])
(;B[mc];W[ob];B[pa];W[ma]C[White connects back, black fails])
(;B[ma];W[ob];B[pa];W[mc]C[Black fails]))