(;AB[gs]AB[fs]AB[fr]AB[fq]AB[gp]AB[hp]AB[ip]AB[jo]AB[ko]AB[lo]AB[lp]AB[np]AB[oq]AB[nr]AB[mr]AB[kq]AB[kr]AW[hs]AW[gr]AW[gq]AW[hq]AW[iq]AW[jq]AW[jp]AW[kp]AW[lq]AW[lr]AW[mq]C[Black to kill]AP[goproblems]
(;B[ls];W[js]
(;B[ks];W[jr])
(;B[nq];W[jr])
(;B[ir];W[jr]))
(;B[js]
(;W[ls]C[CHOICE]
(;B[ir]C[RIGHT])
(;B[jr];W[ir])
(;B[is];W[ir]C[ko])
(;B[mp];W[ks];B[is];W[ir]C[ko]))
(;W[jr];B[is];W[ks];B[hr]C[RIGHT]))
(;B[jr];W[ir];B[js];W[ls])
(;B[ks];W[ir]
(;B[ls];W[js])
(;B[js];W[ls]))
(;B[ir];W[jr])
(;B[is];W[ir]
(;B[hr]C[ko])
(;B[js];W[ls])))