(;AB[ma]AB[mb]AB[mc]AB[md]AB[me]AB[ne]AB[of]AB[pf]AB[qf]AB[qe]AB[re]AB[ob]AW[rb]AW[rd]AW[qd]AW[pe]AW[oe]AW[od]AW[nd]AW[nc]AW[nb]AW[oa]AW[pa]SZ[19]AB[na]C[Can Black kill the whole group? If you think so, go ahead. If you think White can live with at least part of the group click at O14 (Alive)]LB[nf:Alive]CA[windows-874]AP[MultiGo:4.4.4]MULTIGOGM[1] (;B[qb];W[qc] (;B[qa];W[ra] (;B[pb];W[sd]C[White lives.]) (;B[oc];W[pb]C[White cannot save all, but lives anyway.]) (;B[pc];W[pb]) (;B[sd];W[pb]) (;B[pd];W[pc];B[pb];W[oa];B[pa];W[oc])) (;B[pb];W[ra] (;B[qa];W[sd]C[White lives.]) (;B[sd];W[qa] (;B[pc];W[sc]) (;B[oc];W[pc]) (;B[sc];W[sb]) (;B[sb];W[pc])) (;B[pc];W[qa]) (;B[oc];W[pd] (;B[qa];W[sd]) (;B[sd];W[qa]) (;B[sc];W[qa])) (;B[sc];W[qa] (;B[sd];W[sb]) (;B[rc];W[sd]) (;B[sb];W[sd]) (;B[pc];W[sd]) (;B[oc];W[pc]))) (;B[pc];W[pd] (;B[qa];W[ra] (;B[pb];W[sd]) (;B[sd];W[pb])) (;B[pb];W[ra] (;B[qa];W[sd]) (;B[sd];W[qa] (;B[sb];W[oc] (;B[pb];W[sc];B[rc];W[sa]) (;B[sc];W[pb])) (;B[sc];W[sb])) (;B[sc];W[qa]) (;B[sb];W[qa];B[sd];W[oc] (;B[pb];W[sc];B[rc];W[sa]) (;B[sc];W[pb]))) (;B[sd];W[qa]) (;B[ra];W[oc])) (;B[sd];W[pb]) (;B[oc];W[pd] (;B[qa];W[ra] (;B[pb];W[sd]) (;B[sd];W[pb])) (;B[pb];W[ra] (;B[qa];W[sd]) (;B[sd];W[qa]) (;B[sc];W[qa])) (;B[sd];W[pb])) (;B[sc];W[pb])) (;B[pb];W[qa]C[White lives.]) (;B[pc];W[qb]C[] (;B[pd]C[];W[qc]C[Nice capture, but White lives.]) (;B[qc];W[pd] (;B[rc];W[sc]) (;B[pb];W[qa]) (;B[sd];W[rc])) (;B[qa];W[pb] (;B[pd];W[qc]C[White lives with the main part.]) (;B[qc];W[rc])) (;B[pb];W[qa] (;B[pd];W[qc] (;B[oc];W[sd]C[White lives with the main part.]) (;B[sc];W[oc]) (;B[sd];W[oc])) (;B[qc];W[rc]) (;B[sd];W[sc];B[pd];W[qc]C[White lives in sente.]))) (;B[qa];W[pb] (;B[pc]C[];W[qb] (;B[pd];W[qc]C[White lives with the main part.]) (;B[qc];W[rc])) (;B[qb];W[pc]) (;B[qc];W[pc])) (;B[oc];W[pd] (;B[qb];W[pb]) (;B[pb];W[qa]) (;B[qa];W[pb])) (;B[sd];W[pb]) (;B[nf]AW[ma]AW[mb]AW[mc]AW[md]AW[me]AW[ne]AW[of]AW[pf]AW[qf]AW[qe]AW[re]AW[ob]AB[rb]AB[rd]AB[qd]AB[pe]AB[oe]AB[od]AB[nd]AB[nc]AB[nb]AB[oa]AB[pa]AW[na];W[qb]C[You think the corner can live, right? The colors have been swapped so that you can prove it. Save as much as you can; losing a few stones extra but keeping sente is acceptable too.] (;B[qc];W[pb] (;B[ra];W[qa] (;B[sd]C[Easy!RIGHT]) (;B[sc]C[Right!RIGHT]) (;B[oa];W[oc] (;B[pd];W[sd]C[One eye only.]) (;B[sd];W[pd]C[A bit careless to let that may stones fall away, but you're alive in sente.RIGHT]) (;B[sc];W[pd]C[You reached the objective in sente, even though your opponent gets more than he should.RIGHT]) (;B[pc];W[pd] (;B[sd]C[Alive, but in gote AND losing most of your stones - that is not good enough.]) (;B[sc]C[Alive in gote with just a small part of your group - you could have saved a lot more than this.])) (;B[sb];W[sd] (;B[pc];W[pd]) (;B[sc];W[se];B[pc];W[pd]))) (;B[pc];W[oc] (;B[pd];W[sd]) (;B[sd];W[pd]C[Alive in sente. A big loss in stones but okay.RIGHT]) (;B[sc];W[pd]C[There's a price to pay for getting sente. Well I'll let it pass.RIGHT]) (;B[sb];W[sd]) (;B[oa];W[pd] (;B[sd]C[Alive, but in gote AND losing most of your stones - that is not good enough.]) (;B[sc]C[Alive in gote with just a small part of your group - you could have saved a lot more than this.]))) (;B[oc];W[pc] (;B[pd];W[sd] (;B[rc];W[oa]) (;B[sc];W[rc]) (;B[oa];W[rc])) (;B[sd];W[pd]C[Alive in sente albeit with just a small part of your group.RIGHT]) (;B[sc];W[pd]C[Alive in sente albeit with just a small part of your group.RIGHT]) (;B[sb];W[sd]) (;B[oa];W[sd])) (;B[pd];W[sd])) (;B[qa];W[ra]) (;B[pc];W[ra] (;B[sc];W[sb]C[Ko]) (;B[oc];W[qa] (;B[sc];W[sb]C[Ko]) (;B[sb];W[sd]) (;B[sd];W[sb];B[sc];W[rc]C[Ko]) (;B[oa];W[sc] (;B[sd];W[sb]) (;B[sb];W[sd])))) (;B[sc];W[ra];B[pc];W[sb]C[Ko]) (;B[sd];W[ra] (;B[pc];W[sb]) (;B[sb];W[oc]))) (;B[pb];W[pc] (;B[oc];W[qa] (;B[qc];W[ob] (;B[ra];W[sd]MA[pd]MA[rc]) (;B[pd];W[sd] (;B[pb];W[oa]MA[rc]C[S17 is just a false eye. Black is dead.]) (;B[ra];W[rc]) (;B[oa];W[rc]) (;B[sc];W[rc])) (;B[sc];W[ra])) (;B[ob];W[pd]) (;B[pd];W[ob] (;B[qc];W[sd] (;B[pb];W[oa]MA[rc]C[S17 is just a false eye. Black is dead.]) (;B[ra];W[rc]) (;B[oa];W[rc]) (;B[sc];W[rc])) (;B[ra];W[qc] (;B[rc];W[pa];B[sd];W[sb]) (;B[pa];W[rc])) (;B[sc];W[ra])) (;B[ra];W[qc] (;B[rc];W[ob]) (;B[sd];W[rc]) (;B[pd];W[ob]) (;B[ob];W[pd]))) (;B[pd];W[qa]) (;B[qc];W[qa])) (;B[pc] (;W[pb] (;B[qc];W[ra] (;B[sc];W[sb]C[Ko]) (;B[oc];W[qa] (;B[sc];W[sb]C[Ko]) (;B[sb];W[sd]) (;B[sd];W[sb];B[sc];W[rc]C[Ko]) (;B[oa];W[sc] (;B[sd];W[sb]) (;B[sb];W[sd])))) (;B[ra];W[oc] (;B[pd];W[qa];B[sd];W[se]) (;B[qa];W[pd] (;B[sd];W[se] (;B[qc];W[sc];B[rc];W[sb]) (;B[rc];W[sb]) (;B[sb];W[rc] (;B[sc];W[qc]) (;B[qc];W[sc])) (;B[sc];W[qc])) (;B[qc];W[sd]) (;B[sc];W[qc]) (;B[sb];W[sd])) (;B[qc];W[pd] (;B[sd]C[A small life in gote ain't good enough.]) (;B[sc]C[Alive but too small, and losing sente.])) (;B[sd];W[pd];B[qc]C[Alive in gote.]) (;B[sc];W[qc]))) (;W[qc];B[pb])) (;B[qa];W[ra] (;B[pb];W[pc]) (;B[sa];W[pb] (;B[pc];W[ra]) (;B[ra];W[rc]))) (;B[ra];W[qc] (;B[pc];W[rc] (;B[sc];W[sb] (;B[sa];W[pb]) (;B[qa];W[sd]) (;B[pb];W[sd]) (;B[pd];W[sd]) (;B[oc];W[sd]) (;B[sd];W[pb])) (;B[pb];W[sd] (;B[qa];W[pd] (;B[sb];W[oc]) (;B[oc];W[sb]) (;B[qd];W[sb])) (;B[pd];W[sb]) (;B[sb];W[pd] (;B[qa];W[oc]) (;B[qd];W[qa]) (;B[oc];W[qa])) (;B[sc];W[pd])) (;B[qa];W[sd] (;B[sb];W[pb]) (;B[pb];W[pd] (;B[sb];W[oc]) (;B[oc];W[sb]) (;B[qd];W[sb])) (;B[pd];W[pb]) (;B[oc];W[pd] (;B[pb];W[sb]) (;B[sb];W[pb])) (;B[sc];W[pd])) (;B[pd];W[pb]) (;B[sd];W[pb])) (;B[pb];W[pc] (;B[qa];W[pd]) (;B[oc];W[qa] (;B[rc];W[ob]) (;B[sd];W[rc]) (;B[pd];W[ob] (;B[rc];W[pa];B[sd];W[sb]) (;B[pa];W[rc])) (;B[ob];W[pd])) (;B[pd];W[qa]) (;B[rc];W[qa])) (;B[oc];W[pb] (;B[qa];W[pd]) (;B[pd];W[qa]) (;B[pc];W[pd]) (;B[rc];W[qa])) (;B[rc];W[qa]) (;B[sd];W[rc] (;B[qa];W[pb] (;B[sc];W[sb]) (;B[sb];W[sc]) (;B[pc];W[sb])) (;B[sc];W[pb] (;B[qa];W[sb]) (;B[sb];W[qa]) (;B[pc];W[qa])) (;B[pb];W[pc] (;B[oc];W[pd]) (;B[pd];W[qa]) (;B[qa];W[pd]) (;B[sc];W[qa]) (;B[sb];W[qa])) (;B[pc];W[pb])) (;B[qa];W[rc] (;B[sc];W[sb] (;B[sa];W[pb]) (;B[pb];W[sd]) (;B[sd];W[pb]) (;B[pc];W[sd]) (;B[oc];W[sd]) (;B[pd];W[sd])) (;B[pc];W[sd] (;B[sb];W[pb]) (;B[pb]) (;B[pd];W[pb]) (;B[oc];W[pd] (;B[pb]) (;B[sb];W[pb])) (;B[sc];W[pd])) (;B[pb];W[sd] (;B[pd];W[pc]) (;B[pc];W[pd] (;B[sb];W[oc]) (;B[oc];W[sb]) (;B[qd];W[sb])) (;B[sb];W[pd])) (;B[sb];W[pc] (;B[sc];W[pd]) (;B[pd];W[sd])) (;B[oc];W[pc] (;B[pb];W[sd]) (;B[pd];W[sd])) (;B[sd];W[pb] (;B[sc];W[sb]) (;B[sb];W[sc]) (;B[pc];W[sb])) (;B[pd];W[pb];B[sc];W[sb])))) (;B[qc];W[pc] (;B[pb];W[qa] (;B[qb];W[ra]) (;B[rc];W[qb]) (;B[sd];W[qb])) (;B[qb];W[pb]) (;B[qa];W[pb]) (;B[rc];W[qb]) (;B[sd];W[qb])))