(;AB[ra]AB[rb]AB[rc]AW[qd]AW[rd]AW[pd]AW[od]AB[oc]AB[ob]AB[nb]AW[nc]AW[mc]AW[mb]AW[ma]AW[na]MA[ne]C[Can Black live in this shape? If so, play a living move. If not, play the marked position at O15.]AP[goproblems]
(;B[pa]C[Correct. Black lives.RIGHT])
(;B[pb];W[pa]
(;B[oa];W[qb];B[qa];W[qc])
(;B[qa];W[oa]
(;B[qc];W[pc])
(;B[pc];W[qc]))
(;B[qc];W[pc]
(;B[oa];W[qb])
(;B[qb];W[oa])))
(;B[qc];W[pc]
(;B[pb];W[pa]
(;B[oa];W[qb])
(;B[qb];W[oa]))
(;B[pa];W[pb];B[oa];W[qa]))
(;B[ne]C[Wrong. Black can live playing Q19.])
(;B[me]C[Wrong. Black can live playing Q19.])
(;B[nf]C[Wrong. Black can live playing Q19.])
(;B[nd]C[Wrong. Black can live playing Q19.])
(;B[oe]C[Wrong. Black can live playing Q19.])
(;B[qb]
(;W[pa]
(;B[oa];W[pb]
(;B[pc];W[qc])
(;B[qa];W[pc]))
(;B[pb];W[oa]))
(;W[pb]
(;B[pa];W[pc];B[oa];W[qa])
(;B[pc];W[pa]
(;B[oa];W[qc])
(;B[qc];W[oa]))))
(;B[oa];W[pa]
(;B[pb];W[qb];B[qa];W[qc])
(;B[qb];W[pb];B[pc];W[qc])
(;B[qa];W[pb]
(;B[qb];W[pc])
(;B[pc];W[qc]))
(;B[qc];W[pc];B[pb];W[qb])
(;B[pc];W[qc];B[pb];W[qb]))
(;B[pc];W[pa];B[oa];W[qc]
(;B[pb];W[qb])
(;B[qa];W[pb])))