(;AB[rb]AB[ra]AB[qa]AB[pa]AW[sb]AW[rc]AW[qd]AW[qb]AW[pb]AW[pc]AW[oc]AB[ob]AB[nb]AB[nc]AW[na]AW[mb]AW[mc]AB[od]AB[pd]AW[md]AW[ne]AW[pf]AW[pe]AW[rf]C[Black to do his best.]AP[goproblems]
(;B[qc];W[pc]
(;B[qb];W[rd]C[dead :(])
(;B[pb];W[qb]C[Ko! Black can do better.])
(;B[qe];W[qb]
(;B[pb];W[qc];B[re];W[rd])
(;B[rd];W[qc];B[re];W[qf])
(;B[re];W[rd]))
(;B[rd];W[qb];B[qe];W[qc];B[re];W[qf]))
(;B[rd]
(;W[sd]C[CHOICE];B[qc];W[re]
(;B[pc]C[RIGHT])
(;B[pb]C[RIGHT])
(;B[qb];W[pc]C[Misclick?]))
(;W[qc];B[qe]C[RIGHT]))
(;B[qe];W[rd];B[qc])
(;B[re];W[qe]
(;B[qc];W[pc]
(;B[qb];W[rd])
(;B[pb];W[qb]C[Ko. Black can do better.]))
(;B[rd];W[qc])))