411 REFERENCE · Wikibooks
Chess Opening Theory/1. f4/1...e5/2. fxe5/2...d6/3. exd6/3...Bxd6
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Bird's Opening rd nd bd qd kd nd rd pd pd pd pd pd pd bd pl pl pl pl pl pl pl rl nl bl ql kl bl nl rl
3...Bxd6
This move develops with a threat. There are three sane ways to stop Qh4+. The first one, Nf3, is the best move. The second one, g3?!, runs into a rapid drill attack after 3...h5. A sample line: Nf3 h4! Nxh4? (gxh4 is better, but black has good compensation for the pawn after the simple 5...Bg4) Rxh4! gxh4 Qxh4# The third one, 4.h4??, runs into Bg3 mate! Also, one more trap is Nh3?? Bxh3 and Qh4 mate to follow.
Theory table
+456Nf3
g5 +/=g3?!
h5=/-h4??
Bg3#0-1