(;AB[rb]AB[sb]AB[qc]AB[oc]AB[pc]AB[qd]AB[pe]AB[oe]AB[od]AW[qa]AW[sc]AW[rc]AW[rd]AW[re]AW[qe]AW[pf]AW[qg]AW[of]AW[ne]AW[nd]AW[nc]AW[nb]AW[ob]C[1. Black lives]AP[goproblems]
(;B[pb];W[pa]
(;B[ra]C[Black 1 is humble and magnificent. After 3, Black has his two eyes and White cannot cut at x. RIGHT]LB[pb:1]LB[pa:2]LB[ra:3]LB[qb:X])
(;B[qb];W[ra]C[CHOICE];B[sa]
(;W[oa]C[CHOICE])
(;W[pd]C[CHOICE])))
(;B[pa];W[pb]LB[pa:1]LB[pb:2]LB[qb:a]LB[ra:b]C[Although Black 1 is the usual tesuji in this shape, here it fails. If Black next plays 'a', White replies at 'b'.]
(;B[ra];W[qb]C[CHOICE])
(;B[qb];W[ra];B[sa];W[qa]C[CHOICE]))
(;B[ra];W[qb]C[CHOICE])
(;B[qb];W[ra]
(;B[pb];W[pa];B[sa]
(;W[oa]C[CHOICE])
(;W[pd]C[CHOICE]))
(;B[pa];W[pb];B[sa];W[qa]C[CHOICE])))