(;AP[goproblems]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](;B[ba];W[ca](;B[cb]C[RIGHT])(;B[bb]C[Not the best solution.])(;B[ab]C[Not the best solution.])(;B[aa];W[bb](;B[cb];W[ab])(;B[ab];W[cb])))(;B[ca];W[ba](;B[bb];W[cb]C[Disadv. koCHOICE])(;B[cb];W[ab]C[CHOICE])(;B[aa];W[cb];B[bb];W[ca]))(;B[cb];W[ba](;B[ca];W[ab]C[CHOICE])(;B[bb];W[ca])(;B[ab];W[ca]))(;B[bb];W[ba](;B[ca];W[cb]C[Disadv. koCHOICE])(;B[aa];W[ca])(;B[cb];W[ca])))