(;AW[ab]AW[bb]AW[cc]AW[db]AW[da]AB[bc]AB[bd]AB[be]AB[ce]AB[de]AB[fc]AB[fd]AB[fe]AB[ee]AB[eb]AB[fb]AW[fa]AB[ga]AB[hb]C[Black to kill.]AP[goproblems]
(;B[dc]
(;W[dd]C[CHOICE]
(;B[ec]
(;W[ba]C[CHOICE]
(;B[cb]C[RIGHT])
(;B[cd];W[cb])
(;B[ac];W[cb])
(;B[ea];W[cb]))
(;W[cb]C[CHOICE]
(;B[ba]C[RIGHT])
(;B[cd];W[ba])
(;B[ea];W[ba])
(;B[aa];W[ba])
(;B[ca];W[ba])
(;B[ac];W[ba])))
(;B[ba]
(;W[ec]C[CHOICE]
(;B[ca]
(;W[cd];B[ed]C[RIGHT])
(;W[ed];B[cd]C[RIGHT]))
(;B[cd];W[ca];B[ed];W[dc])
(;B[ed];W[ca])
(;B[ea];W[ca])
(;B[cb];W[ca]))
(;W[ca]C[CHOICE]
(;B[ec]C[RIGHT])
(;B[cd];W[ec];B[ed];W[dc])
(;B[ea];W[ec])
(;B[ed];W[ec]C[ko])))
(;B[ca];W[ba]
(;B[ea];W[ec])
(;B[cd];W[ec]))
(;B[cb];W[ec]
(;B[ca];W[ba])
(;B[ba];W[ca])
(;B[cd];W[ca];B[ed];W[dc]))
(;B[ed];W[ba]
(;B[ec];W[cb])
(;B[cd];W[cb])
(;B[cb];W[ec]C[ko]))
(;B[cd];W[ec]
(;B[ba];W[ca];B[ed];W[dc])
(;B[ca];W[ba])
(;B[ed];W[dc]
(;B[ca];W[ba])
(;B[ba];W[ca])
(;B[ea];W[ca]))))
(;W[ba]C[CHOICE]
(;B[cb]C[RIGHT])
(;B[cd];W[cb])
(;B[dd];W[cb])
(;B[ea];W[cb]))
(;W[cb]
(;B[ba]C[RIGHT])
(;B[ca];W[ba])
(;B[aa];W[ba])
(;B[cd];W[ba])
(;B[dd];W[ba])
(;B[ea];W[ba])))
(;B[ba]
(;W[ca]C[CHOICE]
(;B[dc]C[RIGHT])
(;B[dd];W[dc])
(;B[ea];W[dc])
(;B[cd];W[dc]))
(;W[dc]C[CHOICE]
(;B[ca]C[RIGHT])
(;B[ea];W[ca])
(;B[dd];W[ca])
(;B[ac];W[ca])
(;B[ec];W[ca])
(;B[cd];W[ca])
(;B[aa];W[ca])
(;B[cb];W[ca])))
(;B[ca];W[ba])
(;B[aa];W[ba]
(;B[cb];W[dc])
(;B[dc];W[cb]))
(;B[cb];W[dc]
(;B[ca];W[ba])
(;B[ba];W[ca]))
(;B[ea];W[dc]
(;B[ca];W[ba])
(;B[ba];W[ca]))
(;B[ac];W[dc]
(;B[ca];W[ba])
(;B[ba];W[ca]))
(;B[dd];W[dc]
(;B[ba];W[ca])
(;B[ca];W[ba])))
maba