Hunting for Mistakes * me vs. BEREK, Géza

"r1b2rk1/1pp3bp/3p1qp1/p1nPp3/1nP1P3/2N1BN1P/PP1QBP2/2KR3R b - - 0 14"

After White's last 14.0-0-0??
it is Black to move

The game was played in an open tournament in Püspökladány, Hungary, on Jun-20, 2008.
I was the first player and unconciously wanted to get over the game as soon as possible... (I could not sleep previous night, so there might be something to that.)

Try and guess the move that wins the game for Black on the spot. (please write your solution as a comment to this entry)