Originally posted by buffalobillQh5? Then the only defence is g3 which is met by Bxg3 hxg3 (forced, otherwise there's a big attack and black must move his rook out of attack. Best is Re2 I think. However, I don't know what to do after that. Maybe someone could help me) Qxg3 and you have a repetitive check.
[fen]rnbqk2r/ppp3pp/3b4/3p1p2/3Pn3/3B1P2/PPP3PP/RNBQR1K1 b kq - 0 1[/fen]
Here's a real-life position. Playing the Petrov, I'd blundered by not castling sooner. How does Black rescue the game? Assume you're up against a very good player and if you go down a piece, you lose.
EDIT Bxh2+ is also interesting. If Kx black has an obvious repetitive check. If Kh8 Qh5 wins. But I'm not sure what to do after Kf8.
EDIT: 0-0 might also do it. If 0-0 fxe4 fxe4 Be2 Bxh7+ wins a repetition or the game. I think this is the move you were looking for.