(;AB[ar]AB[br]AB[bq]AB[cr]AB[bs]AB[gs]AB[gr]AB[fq]AB[fr]AB[dp]AB[do]AW[aq]AW[ap]AW[bp]AW[cp]AW[cq]AW[hs]AW[hr]AW[gq]AW[gp]AW[fp]AW[bn]AW[iq]AW[dn]AW[en]C[White to kill.]AP[goproblems]
(;W[dq];B[dr])
(;W[eq];B[er];W[dr];B[ds];W[dq];B[es])
(;W[ds];B[dr])
(;W[es];B[dq])
(;W[er];B[eq])
(;W[dr];B[dq]
(;W[ds];B[es]
(;W[eq];B[ep])
(;W[er];B[eq];W[fs]MA[es]C[Very bad ko for white.]))
(;W[es];B[er];W[ds];B[eq])
(;W[er];B[eq])
(;W[eq];B[er]
(;W[ep];B[ds])
(;W[ds];B[ep]
(;W[co];B[es])
(;W[eo];B[es])
(;W[es];B[eq]
(;W[co]C[:)RIGHT])
(;W[eo];B[co]
(;W[cn];B[bo]C[:(])
(;W[bo]C[:)RIGHT])))))))