(;AB[cl]AB[dl]AB[el]AB[bk]AB[aj]AB[cj]AB[bi]AW[ai]AW[bh]AW[ch]AW[dh]AW[ci]AB[di]AB[ej]AB[fk]AB[gk]AB[gj]AW[fj]AW[fi]AW[gi]AW[eh]AW[hj]AW[gl]AW[hl]AW[hi]AW[cm]AW[dm]AW[em]AW[fm]AW[hk]AB[fl]AW[bg]AW[bm]C[If you think white cannot kill, play at T. Else, kill black.]LB[fh:T]AP[goproblems]
(;W[dk]
(;B[ah]
(;W[dj]
(;B[bl]
(;W[al]C[RIGHT])
(;W[ei]C[RIGHT]))
(;B[al]
(;W[bl]C[RIGHT])
(;W[ei]C[RIGHT])))
(;W[al];B[ak];W[dj]C[RIGHT])
(;W[ag]
(;B[dj];W[al];B[ak];W[ai]C[ko])
(;B[bl];W[al];B[dj];W[ai]C[ko])))
(;B[dj]
(;W[ah]
(;B[al];W[bl]C[RIGHT])
(;B[bl];W[al]C[RIGHT]))
(;W[al];B[ah];W[ak]C[RIGHT]))
(;B[bl]
(;W[al]
(;B[dj];W[ah]C[RIGHT])
(;B[ah];W[dj]C[RIGHT]))
(;W[ah]
(;B[dj]
(;W[bj]C[RIGHT])
(;W[al]C[RIGHT]))
(;B[al]
(;W[bj]C[RIGHT])
(;W[ei];B[dj];W[bj])
(;W[dj]C[RIGHT])))
(;W[dj]C[RIGHT]))
(;B[ei]
(;W[bl];B[ah])
(;W[al];B[ah];W[ak]C[RIGHT])
(;W[ek];B[dj];W[al];B[ah];W[ak]C[RIGHT])
(;W[dj];B[ek]
(;W[al];B[ah];W[ak]C[RIGHT])
(;W[ah]C[RIGHT]))
(;W[ah]C[RIGHT])))
(;W[bj];B[dk]
(;W[bl];B[ei])
(;W[ei];B[bl];W[dj];B[bi]
(;W[di];B[ah])
(;W[ah];B[al];W[bj];B[di]C[double ko.])
(;W[ek];B[ah])
(;W[al];B[ah]))
(;W[ak];B[bl];W[ei];B[dj])
(;W[bi];B[bl];W[ei];B[dj]))
(;W[bl];B[ah];W[dk];B[dj])
(;W[ei];B[dk]
(;W[dj];B[bl]
(;W[di];B[ah])
(;W[bj];B[di])
(;W[ah];B[al]
(;W[bj];B[di]C[double ko.])
(;W[di];B[bj]))
(;W[al];B[ah]))
(;W[bj];B[bl];W[dj];B[bi]
(;W[ek];B[ah])
(;W[di];B[ah])
(;W[al];B[ah])
(;W[ah];B[al];W[bj];B[di]C[double ko.])))
(;W[fh]C[Black can be killed.])
(;W[ah];B[dk];W[ei];B[dj]
(;W[bj];B[bl])
(;W[bl];B[bj]))
(;W[al];B[dk]
(;W[bl];B[bj];W[ei];B[dj])
(;W[bj];B[bl];W[ei];B[dj])
(;W[ei];B[dj]
(;W[bj];B[bl])
(;W[bl];B[bj])))
(;W[dj];B[dk])
(;W[ck];B[dk])
(;W[ek];B[dk]))