(;AB[cs]AB[cr]AB[cq]AB[cp]AB[do]AB[dn]AB[fo]AB[fn]AB[gn]AB[hn]AB[ho]AB[ip]AB[iq]AB[ir]AB[is]AW[ds]AW[dr]AW[dq]AW[dp]AW[fp]AW[fq]AW[go]AW[hp]AW[hq]AW[hr]AW[hs]C[Black to kill]AB[ep]AP[goproblems]
(;B[fr];W[er]
(;B[fs];W[gp]
(;B[es];W[eq]
(;B[gr];W[eo]
(;B[gs]C[RIGHT])
(;B[en];W[gs]))
(;B[gs];W[gr]))
(;B[gr];W[gs]C[seki])
(;B[gs];W[gr])
(;B[eo];W[eq];B[gr];W[gs]))
(;B[gr];W[fs]))
(;B[eq];W[er];B[fr];W[eo])
(;B[gp];W[fs])
(;B[fs];W[gp];B[eq];W[er];B[fr];W[eo];B[ep];W[gr])
(;B[gq];W[gp])
(;B[er];W[eq]
(;B[gp];W[fr])
(;B[fr];W[fs])))