(;AB[ac]AB[bc]AB[bb]AB[bd]AB[cd]AB[dd]AB[ec]AB[eb]AW[ad]AW[ae]AW[be]AW[ce]AW[de]AW[fd]AW[ed]AW[fc]AW[dc]AW[db]AP[goproblems]
(;B[ea];W[fb]
(;B[ca];W[da]
(;B[aa]C[RIGHT])
(;B[cb];W[fa];B[aa]C[RIGHT]))
(;B[cb]
(;W[da];B[ca];W[fa];B[aa]C[RIGHT])
(;W[fa]
(;B[da];W[ca])
(;B[ca]
(;W[aa];B[da]C[RIGHT])
(;W[da];B[aa]))
(;B[cc];W[da];B[ca];W[aa]))))
(;B[ca];W[ea]
(;B[aa];W[cb]C[CHOICE])
(;B[cb];W[aa]C[CHOICE]))
(;B[cb];W[ea]
(;B[ca];W[aa]C[CHOICE])
(;B[aa];W[ca]C[CHOICE])))