(;AB[cb]AB[ec]AB[fc]AB[gb]AB[gc]AB[db]AW[cc]AW[bc]AB[bb]AW[ab]AW[dd]AW[ed]AW[hd]AW[hc]AW[hb]AW[gd]AW[ce]AW[ba]AB[fa]C[white to kill]AP[goproblems]
(;W[ca];B[eb];W[da];B[ea]C[];W[ac];B[aa]
(;W[ba];B[ca])
(;W[ca];B[ba]))
(;W[eb]C[];B[ca]
(;W[dc];B[aa]C[Ko])
(;W[ea]C[The only way to kill unconditionally.RIGHT])
(;W[ac];B[ea]))
(;W[ea];B[eb]MA[ea]C[E19 is the second eye.])
(;W[da];B[ea]MA[da]C[D19 is the second eye.]))