(;AB[ao]AB[bo]AB[do]AB[co]AB[dn]AB[dm]AB[em]AB[fm]AB[fl]AB[fj]AB[fi]AB[fk]AB[ei]AB[gi]AB[gg]AB[gh]AB[fg]AB[eg]AB[dg]AB[df]AB[cf]AB[bf]AB[af]AB[cl]AB[ck]AB[cj]AB[bk]AB[aj]AB[bi]AW[cm]AW[bm]AW[al]AW[ak]AW[dl]AW[dk]AW[dj]AW[ci]AW[ch]AW[dh]AW[eh]AW[cg]AW[bg]C[Black to kill.]AP[goproblems]
(;B[ag];W[ah];B[bh];W[bl];B[ai];W[bj]
(;B[ck];W[ah])
(;B[ah];W[ck]))
(;B[ah];W[ag]
(;B[bj];W[bh]
(;B[ai];W[bl])
(;B[di];W[ai]C[ko, white takes first]))
(;B[bn];W[bl])
(;B[cn];W[bl])
(;B[am];W[bl])
(;B[bh];W[bl])
(;B[di];W[bl]
(;B[bh];W[bj])
(;B[fh];W[bj])
(;B[bj]C[White cannot approach.RIGHT]MA[bh]))))