(;AW[ab]AB[bc]AB[cc]AB[ad]AB[bd]AB[db]AB[da]AW[eb]AW[fc]AW[dc]AW[dd]AW[cd]AW[be]AW[cf]AP[goproblems]
(;B[ba];W[bb];B[cb]C[RIGHT];W[ae]C[Black is alive and does not to answer anymore];B[ac]C[RIGHT])
(;B[bb];W[ba];B[ca];W[ea];B[aa]C[Adv. ko])
(;B[cb];W[ba]C[]))