(;AB[cr]AB[dr]AB[eq]AB[fq]AW[br]AW[bq]AW[cq]AW[dq]AW[ep]AW[eo]AW[en]AW[dm]AW[fm]AW[gm]AW[hm]AB[fn]AB[fo]AB[hn]AB[ho]AB[hq]AB[iq]AW[in]AW[io]AW[ip]AW[jp]AW[jq]AB[jr]AB[kr]AB[lr]AB[ls]AW[kq]AW[lq]AW[mq]AW[mr]AW[ms]AW[lp]AW[lo]AW[kn]AW[jn]AB[ko]AB[fp]AB[er]AB[cs]AW[bs]AB[ir]C[White can't kill Black but has the best result.FORCE]AP[goproblems]
(;W[gn]C[FORCE]
(;B[go]C[FORCE]
(;W[gp]C[FORCE];B[hp])
(;W[hp]C[FORCE];B[gp]C[RIGHT]))
(;B[gp]C[FORCE]
(;W[go]C[FORCE];B[hp]C[RIGHT])
(;W[hp]C[FORCE];B[go]C[RIGHT]))
(;B[hp]C[FORCE]
(;W[go]C[FORCE];B[gp]C[RIGHT])
(;W[gp]C[FORCE];B[go])))
(;W[go]C[FORCE];B[gn]C[FORCE];W[hp]C[FORCE];B[gp])
(;W[gp]C[FORCE];B[hp]C[FORCE];W[gn]C[FORCE];B[go])
(;W[gq]C[FORCE];B[hp]C[FORCE];W[gn]C[FORCE];B[go])
(;W[hp]C[FORCE];B[gp]C[FORCE]
(;W[gn]C[FORCE];B[go]C[RIGHT])
(;W[go]C[FORCE];B[gn])))