(;AP[goproblems]AB[ab]AW[ac]AW[bc]AW[bb]AW[ba]AW[cb]AW[dc]AW[ec]AW[fb]AB[ga]AB[gb]AB[gc]AB[fc]AB[ed]AB[dd]AB[cd]AB[cc]AB[bd]C[Taken from Cho Chikun's Encyclipedia of 1,000 Elementary Life and Death Problems. B to kill. Feel free to flag and add variations.CHOICE](;B[da];W[db]C[](;B[ea];W[eb](;B[fa]C[W is dead. :)RIGHT])(;B[ad];W[fa]))(;B[fa]C[RIGHT])(;B[ad];W[ea];B[fa];W[eb])(;B[eb];W[ea];B[fa];W[eb]))(;B[ea]C[];W[da])(;B[eb];W[db](;B[ea];W[da]C[W is alive. :(])(;B[fa];W[da]))(;B[db];W[eb](;B[da];W[ca](;B[fa];W[ea];B[db];W[da]C[W is alive. :(])(;B[ea];W[fa]C[W is alive. :(])(;B[ad];W[ea]))(;B[ea];W[da];B[fa];W[db])(;B[fa];W[da];B[ea];W[db]))(;B[fa];W[da](;B[db];W[eb];B[ea];W[db])(;B[eb];W[db])(;B[ea];W[db]))(;B[ad];W[ea]))