(;AP[goproblems]AB[ca]AB[db]AB[cc]AB[bc]AB[dc]AB[ec]AB[gc]AB[hd]AB[hb]AB[ha]AW[ga]AW[gb]AW[fb]AW[eb]AW[ea]AW[da]AW[cb]AW[bb]AW[ab]C[Black to kill](;B[ba];W[aa](;B[ca]C[RIGHT])(;B[ba];W[ca])(;B[ac];W[ca])(;B[fc];W[ca]))(;B[fc];W[ba])(;B[ac];W[ba])(;B[aa];W[ba]))