411 REFERENCE · Wikibooks
Chess Opening Theory/1. f4/1...e5/2. fxe5/2...d6/3. exd6/3...Bxd6/4. Nf3
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Bird's Opening rd nd bd qd kd nd rd pd pd pd pd pd pd bd nl pl pl pl pl pl pl pl rl nl bl ql kl bl rl
4.Nf3
This is the most common move, and is also the best. The most common, and most aggressive reply, is the Lasker variation, 4...g5
Theory table
+45678...
g5g3
g4Nh4 Bg4 +/=