(;AP[goproblems]AW[aa]AW[ca]AB[ab]AB[cb]AB[db]AB[da]AB[bd]AB[ad]AW[bc]AW[ae]AW[be]AW[ce]AW[cd]AW[dc]AW[ec]AW[eb]AW[ea]C[Black to live](;B[bb]C[Correct, White cannot connect at B19RIGHT])(;B[ac];W[bb])(;B[ba];W[bb](;B[cc];W[ca])(;B[ac];W[aa]))(;B[cc];W[bb]))