(;SZ[13]AB[db]AB[eb]AB[dc]AB[cc]AB[bd]AB[be]AB[ce]AB[df]AB[ef]AB[ff]AB[gf]AB[ge]AB[gd]AB[ed]AW[bb]AW[cb]AW[bc]AW[da]AW[ea]AW[fb]AW[gc]AW[hb]AW[hd]AW[he]AW[hf]AW[gg]AW[fg]AW[eg]AW[dg]AW[cg]AW[cf]AW[bf]AW[ae]AW[ad]AW[fd]AW[ec]AP[goproblems]
(;B[dd];W[ee]
(;B[de]C[RIGHT])
(;B[fc]C[RIGHT]))
(;B[fc];W[de]
(;B[cd];W[ec]C[A ko, black can do better])
(;B[fe];W[dd]C[]
(;B[cd];W[ec]C[])
(;B[ee];W[cd]C[])
(;B[ec];W[cd]C[])))
(;B[fe]
(;W[de]
(;B[fc];W[dd]C[]
(;B[cd];W[ec]C[])
(;B[ee];W[cd]C[])
(;B[ec];W[cd]C[]))
(;B[dd];W[ee];B[fc];W[cd]C[]))
(;W[dd];B[fc];W[de]
(;B[cd];W[ec]C[])
(;B[ee];W[cd]C[])
(;B[ec];W[cd]C[])))
(;B[ee];W[dd];B[fc]C[A ko, black can do better])
(;B[de];W[fe];B[fc]C[A ko, black can do better]))