(;AP[goproblems]AB[ob]AB[nb]AB[nc]AW[oa]AW[na]AW[mb]AW[mc]AW[ma]AW[nd]AW[oc]AW[od]AW[md]AB[pc]AB[pa]AB[qc]AB[rc]AB[sc]AW[pd]AW[qd]AW[rd]AW[sd]MA[oa]C[White makes a mistake - how to live?](;B[pb];W[rb];B[ra];W[sb];B[qb];W[qa])(;B[qb];W[ra])(;B[sb];W[ra])(;B[qa];W[rb])(;B[sa];W[rb])(;B[rb];W[pb](;B[sa];W[qa])(;B[ra])(;B[qa];W[sa]))(;B[ra];W[sb](;B[pb];W[rb];B[qb];W[qa])(;B[rb];W[pb])(;B[qb];W[pb](;B[ob]C[RIGHT])(;B[qa])(;B[rb];W[ob]))(;B[qa];W[pb])))