(;C[Black to kill]AW[ab]AW[bb]AW[cc]AW[dc]AW[ec]AW[fb]AB[bc]AB[bd]AB[cd]AB[dd]AB[ed]AB[fc]AB[gc]AB[gb]AW[ib]AP[goproblems]
(;B[da]
(;W[eb]C[CHOICE]
(;B[ea];W[fa];B[cb]C[Good Job!RIGHT])
(;B[fa];W[ea];B[cb];W[ga]C[]
(;B[ha];W[hb]C[Ko])
(;B[ba];W[ha]))
(;B[cb];W[db]
(;B[ba];W[ca])
(;B[ca];W[ba])))
(;W[ca];B[eb]C[RIGHT])
(;W[ea];B[cb];W[eb];B[ga]C[RIGHT]))
(;B[db];W[eb];B[cb];W[ca]C[White is alive])
(;B[eb];W[db];B[fa];W[da]C[White is alive])
(;B[ba];W[ca];B[da];W[db]C[Ko])
(;B[ca];W[da]
(;B[cb];W[db];B[ba];W[aa]C[White has a miai to make life]LB[ca:A]LB[fa:B])
(;B[db];W[eb];B[ea];W[cb];B[fa];W[ba]C[Black can't connect])
(;B[eb];W[db]
(;B[fa];W[ba]C[White is alive])
(;B[ba];W[fa]C[White is alive])))
(;B[cb];W[db];B[ca];W[da]
(;B[fa];W[ba]C[White is alive])
(;B[ba];W[aa]C[White has a miai to make life]LB[ca:A]LB[fa:B]))
(;B[ea];W[da]
(;B[db];W[eb];B[ca];W[cb];B[da];W[fa];B[ba];W[aa]C[White is alive])
(;B[ba];W[db];B[fa];W[ca]C[White is alive])
(;B[fa];W[db]C[White is alive])
(;B[eb];W[db];B[fa];W[ca]C[White is alive]))
(;B[fa];W[eb]
(;B[ca];W[cb];B[da];W[ea];B[ba]C[Seki])
(;B[da];W[ea];B[cb];W[ga]C[];B[ha];W[hb]C[Ko])))