(;AB[qb]AB[se]AB[re]AB[qe]AB[pe]AB[oe]AB[nd]AB[ld]AB[kc]AB[lb]AB[na]AW[ma]AW[nb]AW[pc]AW[qc]AW[rc]C[Black to kill unconditionally.]AP[goproblems] (;B[mb] (;W[oc];B[oa];W[pa] (;B[la];W[ob];B[ma];W[rb];B[sc];W[sb];B[ra];W[pb];B[qa];W[sd];B[rd];W[sa];B[qa]C[Great! You did it. :)RIGHT]))) (;B[oc];W[ob];B[pb];W[sc] (;B[rb];W[mb]C[White is alive.]) (;B[mb];W[rb];B[nc];W[oa]C[Black cannot play on Q19, so white is alive!])) (;B[rb];W[sb];B[ra];W[mb] (;B[oc];W[ob]C[White is alive.]) (;B[ob];W[oc]C[White lives.]) (;B[pb];W[ob]C[Black cannot kill white- he lives.])) (;B[sc];W[sb];B[sd];W[rb];B[ra];W[mb]C[White is alive.]) (;B[sb];W[sc];B[rb];W[pb];B[mb];W[oa];B[oc];W[ob]C[Black wont get any better than ko this way.]) (;B[ob];W[oc];B[nc];W[pb];B[mb];W[rb]C[White is alive.]) (;B[pb];W[ob];B[rb];W[sb];B[ra];W[mb]C[White lives.]))