(;AW[rl]AW[ql]AW[pk]AW[ok]AW[qj]AW[rj]AW[si]AW[rh]AW[sg]AW[rg]AW[rf]AW[re]AB[qd]AB[qe]AB[qf]AB[qg]AB[qh]AB[qi]AB[pj]AB[oj]AB[nj]AB[om]AB[pm]AB[qm]AB[rm]AB[ri]AB[mk]AB[ml]AB[nm]AW[rd]AW[rc]AB[qc]AB[qb]AB[rb]C[Black to kill.]AP[goproblems]
(;B[pl]
(;W[sl]C[CHOICE]
(;B[qk];W[rk];B[sj]C[RIGHT])
(;B[sj];W[sk];B[qk]C[RIGHT])
(;B[sc];W[sj]))
(;W[qk]C[CHOICE]
(;B[sk];W[sl]
(;B[sj]C[RIGHT])
(;B[sc];W[sj]))
(;B[sl];W[sk])
(;B[sc];W[sl])))
(;B[sl];W[sk]
(;B[pl];W[qk])
(;B[qk];W[pl])
(;B[rk];W[qk]))
(;B[sk];W[sl]
(;B[qk];W[pl])
(;B[pl];W[sj])
(;B[sj];W[rk]
(;B[sj];W[pl];B[sh]C[You could avoid ko.])
(;B[pl];W[sj])))
(;B[rk];W[sk])
(;B[sc];W[sl])
(;B[sj];W[sk])
(;B[qk];W[pl]))