(;AB[qa]AB[rb]AB[rc]AB[rd]AB[qd]AB[pd]AB[od]AB[nd]AB[mc]AB[lc]AB[kc]AB[kb]AW[la]AW[lb]AW[mb]AW[na]AW[nc]AW[oc]AW[pc]AW[qc]AW[qb]C[Black to kill White]AP[goproblems]
(;B[oa];W[ob];B[pa]C[Well done now white has only one eye !!!RIGHT])
(;B[pa];W[oa]
(;B[ob];W[nb]C[CHOICE])
(;B[pb];W[ob]C[CHOICE]))
(;B[pb];W[ob];B[pa];W[oa]C[CHOICE])
(;B[ob];W[pb]
(;B[oa];W[nb]C[CHOICE])
(;B[pa];W[nb]C[CHOICE]))
(;B[nb];W[ob]C[CHOICE])
(;B[ka];W[pa]C[CHOICE])
(;B[md];W[pa])
(;B[ra];W[pa]C[CHOICE]))