(;AB[rb]AB[qd]AB[pd]AB[oc]AB[ob]AW[nb]AW[nc]AW[od]AW[pe]AW[qe]AW[re]AW[nd]C[White to kill. Ko is failure]AP[goproblems] (;W[pc] (;B[pb];W[qc] (;B[qb] (;W[rc];B[sc];W[rd] (;B[sb];W[oa];B[pa];W[ra]C[RIGHT]) (;B[oa];W[sb];B[sa];W[qa]C[RIGHT])) (;W[rd];B[rc] (;W[sc];B[sb];W[oa];B[pa];W[ra]C[RIGHT]) (;W[oa];B[sc] (;W[pa];B[qa];W[sa];B[na];W[oa];B[ma]C[Black may run away...]) (;W[sa];B[pa];W[ra]C[RIGHT]) (;W[ra];B[sa];W[sb];B[qa]) (;W[qa];B[ra]) (;W[na];B[pa];W[ra];B[sa];W[sb]C[Ko])))) (;B[rc];W[rd];B[qb] (;W[sc] (;B[sb];W[oa];B[pa];W[ra]C[RIGHT]) (;B[oa];W[sb]C[RIGHT])) (;W[oa];B[pa];W[sc];B[sb];W[ra]C[RIGHT]))) (;B[qc]C[CHOICE] (;W[pb];B[rd] (;W[sc] (;B[sd]C[CHOICE] (;W[sb];B[qb] (;W[oa] (;B[sa];W[qa]C[RIGHT]) (;B[qa];W[sa]C[RIGHT])) (;W[pa];B[qa];W[oa];B[sa]C[Ko]) (;W[sa];B[pa]) (;W[ra];B[pa])) (;W[qb];B[qa];W[oa] (;B[sb];W[ra]C[RIGHT]) (;B[ra];W[sb]C[RIGHT])) (;W[ra];B[qb] (;W[qa];B[pa]) (;W[oa];B[qa];W[sb];B[rc])) (;W[qa];B[ra] (;W[sb]C[RIGHT]) (;W[oa];B[sb])) (;W[sa];B[qb];W[oa];B[sb]) (;W[se];B[qb];W[oa];B[sb])) (;B[qb];W[oa] (;B[sd] (;W[qa];B[ra];W[sb]C[RIGHT]) (;W[sb];B[qa];W[sa]C[RIGHT])) (;B[sb];W[sd]C[RIGHT]) (;B[qa];W[sb];B[sd];W[sa]C[RIGHT]))) (;W[qb];B[qa] (;W[oa];B[sc] (;W[se];B[sd];W[ra];B[sa]) (;W[ra];B[sa]TR[rc]TR[sb];W[se];B[sd]) (;W[sa];B[ra])) (;W[sd];B[pa])) (;W[ra];B[qb] (;W[oa];B[qa];W[sc];B[sd];W[sb];B[sa]C[Black can do Oshitsubushi]) (;W[pa];B[qa] (;W[oa];B[sc]) (;W[sc];B[oa]))) (;W[sd];B[qb] (;W[oa];B[sc]) (;W[sc];B[pa]) (;W[pa];B[qa] (;W[sc];B[oa]) (;W[oa];B[sc]))) (;W[rc];B[sc];W[qb];B[qa]TR[rc]TR[sb]C[]) (;W[sb];B[sc] (;W[qb];B[qa];W[oa]) (;W[qa];B[ra]) (;W[se];B[sd];W[qb];B[sa]) (;W[ra];B[qb])) (;W[qa];B[ra] (;W[sd];B[sc]) (;W[oa];B[sc]) (;W[sc]C[RIGHT])) (;W[oa];B[sc] (;W[qb];B[ra]) (;W[qa];B[ra]) (;W[se];B[sd] (;W[ra];B[qa];W[qb];B[sa]) (;W[qa];B[ra]) (;W[qb];B[ra])) (;W[ra];B[qa] (;W[se];B[sd];W[qb];B[sa]) (;W[qb];B[sa];W[se];B[sd]))) (;W[pa];B[qa] (;W[sc];B[sd] (;W[sb];B[sa]C[Ko]) (;W[oa];B[sb])) (;W[sd];B[sc]) (;W[qb];B[oa]) (;W[oa];B[sc]))) (;W[rd];B[pb]) (;W[sc];B[pb]) (;W[sd];B[pb]) (;W[oa];B[pb]) 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(;W[ra];B[pb]) (;W[pb];B[pc]) (;W[qa];B[ra]) (;W[pc];B[pb]))) (;W[oa];B[qc] (;W[qa];B[ra];W[pb];B[rd]) (;W[pb];B[rd]) (;W[rd];B[pb];W[rc];B[qa]) (;W[pa];B[rd] (;W[ra];B[qb] (;W[pb];B[qa]) (;W[qa];B[pb])) (;W[pb];B[ra]))) (;W[qa];B[rd] (;W[ra];B[qb];W[oa];B[pb] (;W[qc];B[pa]) (;W[pa];B[qc])) (;W[oa];B[qb] (;W[pb];B[ra]) (;W[ra];B[pb] (;W[pa];B[qc]) (;W[qc];B[pa]))) (;W[pb];B[qb] (;W[pc];B[qc];W[oa];B[ra]) (;W[ra];B[oa] (;W[pc];B[qc]) (;W[na];B[pc]))) (;W[pa];B[oa];W[ra];B[qb]) (;W[qb];B[ra];W[oa];B[qc])) (;W[pa];B[qc] (;W[oa];B[rd];W[ra];B[qb] (;W[qa];B[pb]) (;W[pb];B[qa])) (;W[rd];B[pb];W[rc];B[oa];W[ra];B[qb]) (;W[pb];B[rd];W[ra];B[qb] (;W[oa];B[qa]) (;W[qa];B[oa]))) (;W[rd];B[qb] (;W[rc];B[pa]) (;W[pa];B[rc];W[pb];B[qa])) (;W[pb];B[rd] (;W[qb];B[qa] (;W[pa];B[ra] (;W[qc];B[oa]) (;W[pc];B[qc]) (;W[oa];B[qc])) (;W[oa];B[qc]) (;W[qc];B[pa])) (;W[oa];B[qb]) (;W[pc];B[qc] (;W[qb];B[qa];W[oa]) (;W[qa];B[ra]) (;W[se];B[sd];W[qb];B[sa]) (;W[ra];B[qb])))) (;W[qb];B[pb]C[CHOICE] (;W[qc];B[rc] 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