(;AB[ac]AB[bb]AW[ab]AW[ad]AW[cc]AW[cd]AW[ce]AW[dd]AW[ed]AW[ec]AW[eb]AW[db]AB[be]AB[bf]AB[cf]AB[de]AB[ee]AB[fe]AB[fd]AB[fc]AB[fb]AB[fa]AB[ea]AP[goproblems]
(;B[bc];W[bd];B[cb];W[ca];B[aa];W[da]C[CHOICE])
(;B[cb];W[da];B[aa];W[bd]
(;B[ca];W[bc];B[ae];W[ab]C[Disadv. koCHOICE])
(;B[bc];W[ca];B[ae]C[CHOICE]))
(;B[bd];W[bc]C[CHOICE])
(;B[da];W[ca]
(;B[cb];W[bc];B[ba]C[RIGHT])
(;B[bc];W[bd]
(;B[ba];W[cb]C[CHOICE])
(;B[aa];W[cb];B[ae]C[CHOICE])))
(;B[ba];W[cb]
(;B[bc];W[bd]C[CHOICE])
(;B[aa];W[bc]
(;B[bd];W[ca]C[CHOICE])
(;B[da];W[ca]C[CHOICE]))
(;B[da];W[ca]C[CHOICE]))
(;B[aa];W[bc]
(;B[cb];W[da]
(;B[bd];W[ab]C[Disadv. koCHOICE])
(;B[ca];W[ab]C[Disadv. koCHOICE]))
(;B[bd];W[ab]C[Disadv. koCHOICE])
(;B[da];W[ca]
(;B[bd];W[ab]C[Disadv. koCHOICE])
(;B[cb];W[ab]C[Disadv. koCHOICE]))
(;B[ca];W[da];B[bd];W[ab]C[Disadv. koCHOICE])
(;B[ba];W[cb]C[CHOICE]))
(;B[ca];W[da];B[bc];W[bd]
(;B[ae];W[aa]C[CHOICE])
(;B[aa];W[cb];B[ae];W[ba]C[Disadv. koCHOICE])))