(;AB[ba]AB[ac]AB[bd]AB[be]AB[dd]AB[ee]AB[ec]AB[fc]AB[gd]AB[gb]AW[ca]AW[ab]AW[bc]AW[cc]AW[dc]AW[eb]AP[goproblems]
(;B[cb];W[da];B[bb];W[fb]
(;B[fa]C[RIGHT])
(;B[ad]C[RIGHT]))
(;B[da];W[db];B[cb]C[RIGHT])
(;B[fb];W[db];B[bb];W[ea]C[])
(;B[ea];W[fa]
(;B[fb];W[da];B[ga];W[bb];B[db];W[cb];B[ea]C[Adv. ko])
(;B[da];W[db]C[])
(;B[cb];W[bb]
(;B[da];W[db]
(;B[fb];W[ca])
(;B[ca];W[fb]
(;B[ga];W[aa];B[ca];W[da])
(;B[cd];W[aa];B[ca];W[da])))
(;B[db];W[da])
(;B[fb];W[db])
(;B[ga];W[db];B[fb];W[da])))
(;B[fa];W[db]
(;B[ea];W[bb]C[FORCE])
(;B[bb];W[ea]C[]))
(;B[bb];W[cb]
(;B[ea];W[fa];B[fb];W[da]C[])
(;B[aa];W[ab]C[])))