(;AP[goproblems]AB[ab]AB[bc]AB[cb]AB[ba]AW[ae]AW[be]AW[bd]AW[cd]AW[cc]AW[dc]AW[db]AW[eb]AW[ea]C[Simple problem: black to live in the best way possible.](;B[ad];W[ac]C[This will result in double ko and black will die.])(;B[da];W[ca]C[This will result in double ko and black will die])(;B[ac];W[ca](;B[da]C[White must find the first ko threat.RIGHT])(;B[ad];W[bb]))(;B[ca];W[ac](;B[ad]C[White must find the first ko threat.RIGHT])(;B[da];W[bb]))(;B[bb]C[You just filled in your eye, both gote and dead.])(;B[aa]C[You just filled in your eye, both gote and dead.]))