(;AB[cb]AB[bb]AB[ec]AB[fc]AB[gc]AW[hb]AW[hc]AW[hd]AW[gd]AW[ed]AW[cc]AW[bc]AW[cd]AW[dd]C[Black to live]AP[goproblems]
(;B[gb];W[ab]C[At most a ko -- see problem 9763];B[ba];W[db];B[dc];W[eb];B[da];W[ea]C[Black can live without a ko.])
(;B[ab]
(;W[fa]C[]
(;B[ga];W[gb];B[ea];W[fb];B[eb]C[RIGHT])
(;B[ba];W[db];B[dc];W[eb])
(;B[eb];W[ea];B[da];W[dc])
(;B[fb];W[ea];B[ga];W[gb];B[da];W[dc])
(;B[ea];W[eb]
(;B[fb];W[da])
(;B[db];W[da]))
(;B[da];W[ba]))
(;W[ea]C[]
(;B[fa];W[fb]
(;B[da];W[gb]
(;B[eb];W[dc])
(;B[ba];W[db];B[eb];W[dc]))
(;B[gb];W[ga]
(;B[eb];W[da];B[fa])
(;B[da];W[db]
(;B[eb];W[ca])
(;B[dc];W[ca]))))
(;B[eb];W[fa];B[da];W[dc])
(;B[da];W[db]
(;B[eb];W[dc])
(;B[dc];W[ca]
(;B[fa];W[ga]
(;B[fb];W[fd])
(;B[eb];W[fb];B[ba]C[RIGHT]))
(;B[ba];W[ac])
(;B[eb];W[fa]
(;B[ba];W[da];B[ga]C[RIGHT])
(;B[da]C[NOTTHIS])
(;B[ga];W[gb]
(;B[ba]C[RIGHT])
(;B[da]C[NOTTHIS])))))
(;B[gb];W[db];B[dc];W[ga])))
(;B[ea];W[db];B[dc];W[ab]
(;B[da];W[ba])
(;B[eb];W[ba])
(;B[ba];W[da];B[ga];W[eb]
(;B[fb];W[gb])
(;B[gb];W[fa];B[fb];W[ea])))
(;B[fa];W[ab];B[ba];W[da]
(;B[ea];W[gb];B[fb])
(;B[db];W[gb]))
(;B[db];W[ea]
(;B[ab];W[ga])
(;B[da];W[ab];B[fa];W[ba])
(;B[eb];W[fa])
(;B[fa];W[ga])))