I was playing 9x9 and impulsively plopped down here thinking
the kill would be simple. Kill without ko.
A weak response from black could lead to this problem
(;AP[goproblems]AB[ca]AB[cb]AB[bc]AB[bd]AB[be]AW[da]AW[db]AW[dc]AW[dd]AW[de]AW[ce]AW[cf]AW[bf]AW[ba]C[Kill without ko](;W[ab];B[bb]C[black lives.])(;W[bb];B[cc](;W[ac];B[ab];W[aa];B[ad]C[This MIGHT work if I am not your opponent AND if you had that extra liberty taken care of on the outsid and if this was the case, I would have created a shape that results in ko a few moves earlier])(;W[ae]C[RIGHT])(;W[ab];B[ae];W[ac]MA[ad]C[play the squareCHOICE];B[ad];W[cd];B[aa];W[ab]C[this ko, so wrong]))(;W[cc]C[B connects and lives];B[bb])(;W[ad];B[ae];W[bb];B[cc]C[B lives easy])(;W[ac];B[ab]C[it might feel like a sweet spot...but its not.])(;W[ae](;B[bb](;W[ad]C[RIGHT];B[ac](;W[af];B[aa]C[almost, go back 2 moves])(;W[aa]C[yes!];B[af];W[ae]C[cleanRIGHT]))(;W[ab];B[ac]C[ouch. B lives because you tried to be tricky])(;W[ac];B[ad]C[bad. B lives])(;W[aa]C[RIGHT]))(;B[ab];W[ad]C[RIGHT])(;B[ad](;W[bb];B[cc];W[ab]C[RIGHT])(;W[cc];B[bb];W[ab];B[ac]C[1 liberty short])(;W[ab]C[RIGHT])))(;W[cd];B[ab](;W[cc];B[bb](;W[ae];B[ad])(;W[ad];B[ae]))(;W[ae];B[ad])))