(;AB[dc]AB[cc]AB[bd]AB[bb]AW[ec]AW[eb]AW[fb]AW[dd]AW[cd]AW[ce]AW[cf]C[white just play 'a']AW[ch]AW[ca]AW[ee]LB[ca:A]AP[goproblems]
(;B[ba];W[ac];B[ab]C[RIGHT])
(;B[db];W[be]
(;B[ac];W[ae]
(;B[ad];W[ab];B[aa];W[ba]
(;B[da];W[ab]C[Ko])
(;B[ab];W[da])
(;B[cb];W[ab]C[Ko.]))
(;B[da];W[ad];B[bc];W[ba];B[aa];W[ab]C[Ko])
(;B[ba];W[da]))
(;B[ba];W[ad]
(;B[da];W[ab])
(;B[bc];W[da])
(;B[ac];W[bc]C[Ko]))
(;B[da];W[ad]
(;B[bc];W[ac])
(;B[ac];W[bc]C[Ko])
(;B[ba];W[ab])
(;B[ab];W[ba]))
(;B[ad]
(;W[ba];B[da];W[ab]
(;B[bc]C[Seki])
(;B[cb];W[ea];B[aa];W[ba];B[ac];W[ae]C[Ko]))
(;W[bc];B[ac]))
(;B[ab];W[ad]))
(;B[ac];W[ba];B[cb];W[da];B[be];W[bf];B[ae];W[ab]C[Ko])
(;B[be];W[ac];B[ba];W[ab];B[bg];W[bf];B[af];W[bh])
(;B[da];W[db]
(;B[cb];W[ac]
(;B[be];W[bf]
(;B[ba];W[ab])
(;B[ab];W[ba]))
(;B[ba];W[ab]))
(;B[ba];W[cb]
(;B[be];W[bf])
(;B[ac];W[be])
(;B[ab];W[bc]))
(;B[ac];W[cb]
(;B[be];W[ba])
(;B[ba];W[be]))
(;B[be];W[bf]
(;B[ba];W[cb])
(;B[cb];W[ac]
(;B[ba];W[ab])
(;B[ab];W[ba])))
(;B[ab];W[ba]))
(;B[ab];W[be]
(;B[ba];W[ad])
(;B[ad];W[ba])
(;B[da];W[db]
(;B[ba];W[ad])
(;B[ad];W[ba])))
(;B[cb];W[ac]))