xela: The white stones on the right seem to be alive, with eyes at a and b. Black can try the eye-stealing tesuji of c, but white replies at d and lives.
xela: The best continuation I can find is and , threatening to capture white's centre group. Then makes ko.
If white tries to avoid the ko by playing , then causes a shortage of liberties that makes possible.
(If white plays at , then at , white a, black b.)
LukeNine45: at leaves two ways to make another eye, no?
xela: Um, (looks sheepish), yes.
xela: I keep oscillating between "look, black can make a ko this way!" and "no, white is alive, why did black resign?"