(;AW[bb]AB[bc]AB[bd]AB[cc]AB[dc]AB[db]AB[da]AW[eb]AW[gb]AW[ec]AW[ed]AW[dd]AW[cd]AW[be]AW[cf]AP[goproblems]
(;B[ba];W[ab]
(;B[cb];W[ea]
(;B[ac]C[RIGHT])
(;B[ad];W[ae]C[]))
(;B[ad];W[cb]C[seki];B[ca]C[seki];W[ae]C[seki]))
(;B[ad];W[ab]
(;B[ba]
(;W[cb]C[CHOICE];B[ca]C[seki];W[ae]C[seki])
(;W[aa]
(;B[cb];W[ca];B[ac]C[])
(;B[ca]C[])))
(;B[cb];W[ba]C[]))
(;B[ab];W[ba];B[ad]
(;W[ae]C[CHOICE]
(;B[cb];W[ea])
(;B[hf];W[aa];B[cb];W[ac])
(;B[aa];W[ea]
(;B[ca];W[ac];B[ab])
(;B[cb];W[ac]
(;B[ab])
(;B[aa];W[ab]))))
(;W[aa]
(;B[cb];W[ac];B[ca]C[])
(;B[ca];W[ac];B[cb]C[]))))