Chess Opening Theory/1. e4/1...d5/2. exd5/2...Qxd5/3. Nc3/3...Qa5/4. b4

White thrusts her b-pawn at the queen, sacrificing it for quick development and open lines for attack ideas like Ba3, Rb1. This line scores very well for white and can be deadly in a practical game. This line has been tried by Emmanuel Lasker and Jose Raul Capablanca, and the results aren’t bad. White does not have full compensation for the pawn, but still has a lot of it.

Black can decline the sacrifice with 4...Qb6, but usually accepts the pawn with 4...Qxb4 instead.