(;AW[ab]AW[bb]AW[bc]AW[ca]AW[cd]AW[ce]AW[dc]AW[ec]AW[eb]AB[da]AB[ac]AB[bd]AB[be]AB[cf]AB[df]AB[ed]AB[fd]AB[fc]AB[fb]AB[fa]AP[goproblems]
(;B[ba]
(;W[aa]C[CHOICE]
(;B[cb];W[db];B[ba]C[Indeed, Ko. Well done!RIGHT])
(;B[ea];W[db]))
(;W[cb];B[ea]C[RIGHT]))
(;B[cb];W[ba]
(;B[db];W[ea])
(;B[cc];W[db])
(;B[ea];W[db])
(;B[dd];W[cc]))
(;B[ea];W[db])
(;B[db];W[ea])
(;B[cc];W[db]
(;B[dd];W[ea])
(;B[de];W[cb])
(;B[ea];W[dd]))
(;B[dd];W[ea]
(;B[db];W[cb])
(;B[cb];W[ba])
(;B[cc];W[cb])
(;B[de];W[cc]))
(;B[de];W[db]
(;B[cc];W[dd])
(;B[ea];W[cc])
(;B[cb];W[cc])
(;B[ba];W[ea])))