(;AB[ac]AB[bc]AB[cc]AB[cd]AB[dd]AB[ed]AB[ec]AB[eb]AB[db]AW[da]AW[ea]AW[fa]AW[fb]AW[fc]AW[ee]AW[fd]AW[de]AW[ce]AW[be]AW[bd]AW[ad]AP[goproblems]
(;B[ba];W[ca]
(;B[cb]C[RIGHT])
(;B[bb]C[Not the best solution.RIGHT])
(;B[ab];W[cb];B[bb]C[Not the best solution.RIGHT]))
(;B[ca];W[ba]
(;B[bb];W[cb]C[Disadv. koCHOICE])
(;B[cb];W[ab]C[CHOICE]))
(;B[cb];W[ba];B[ca];W[ab]C[CHOICE])
(;B[bb];W[ba];B[ca];W[cb]C[Disadv. koCHOICE]))