(;SZ[13]AB[bb]AB[cb]AB[cc]AB[dd]AB[ed]AB[fd]AB[fc]AB[fb]AW[ab]AW[bc]AW[cd]AW[be]AW[de]AW[ee]AW[ge]AW[fe]AW[gd]AW[gc]AW[gb]AW[ec]AW[dc]AP[goproblems]
(;B[fa];W[ba]
(;B[eb];W[ca];B[db];W[da];B[ea]C[RIGHT])
(;B[db];W[ca]
(;B[da];W[eb]C[CHOICE])
(;B[eb];W[da];B[ea]C[RIGHT])))
(;B[eb];W[fa]
(;B[ea];W[ba]
(;B[ca];W[db]C[CHOICE])
(;B[ga];W[ib]
(;B[db];W[ca]C[CHOICE])
(;B[ca];W[db];B[da];W[dc]C[CHOICE]))
(;B[db];W[ca]C[CHOICE]))
(;B[db];W[ea];B[da];W[ba];B[ga];W[fa]C[CHOICE])
(;B[ba];W[ea];B[db];W[da]C[CHOICE])
(;B[da];W[ba]C[CHOICE]))
(;B[db];W[fa];B[eb];W[ea]
(;B[ba];W[da]C[CHOICE])
(;B[da];W[ba]C[CHOICE])))