Chess Opening Theory/1. b4/1...e5/2. Bb2/2...Bxb4

Polish Opening, Main Line rd nd bd qd kd nd rd pd pd pd pd pd pd pd pd bd pl bl pl pl pl pl pl pl rl nl ql kl bl nl rl Polish Opening, Main Line 2...Bxb4 Black takes the undefended pawn which will most likely result in White recapturing with 3. Bxe5. Not only has Black now ceded White a central pawn majority for the b-pawn, but Black also has to worry about white's threat on g7. Also, a sharper but very risky option for White is 3. f4?!. At this point, Black can safely gain some form of advantage with 3...d6 4. fxe5 dxe5 5. Bxe5, due to white's weakened kingside and missing f-pawn. Black has, on the other hand, traded two central pawns for two flank pawns. Black can also accept the gambit with 3...exf4?!, leading to wild play and an unclear position after 4. Bxg7 Qh4+! 5. g3 fxg3 6. Bg2! gxh2+ 7. Kf1 hxg1=Q+ 8. Kxg1 Qg3 9. Bxh8, where White has a rook and a pawn for a knight and three pawns. The board is wide open and both sides have possibilities, though computers evaluate the position as objectively better for White. Nevertheless, computer evaluation has suggested that 3...Nh6! gives Black a large, if not winning advantage. Theory table 1. b4 e5 2. Bb2 Bxb4 3 4 5 6 7 8 9 Bxe5Nf6 Bxf6Qxf6 =/+ ...f6 Bd4 = f4?!exf4?! Bxg7Qh4+! g3fxg3 Bg2!gxh2+ Kf1hxg1=Q+ Kxg1Qg3 Bxh8... +/- f4?!d6 fxe5dxe5 Bxe5Nf6 Bxf6Qxf6 -+ f4?!Nh6! Bxe5O-O! e3Nf5 Bd3d5 Bxf5Bxf5 Ne2Nc6 O-ONxe5 -+ References http://www.chessgames.com/perl/analysis?fen=rnbqk1nr/pppp1ppp/8/4p3/1b6/8/PBPPPPPP/RN1QKBNR+w+KQkq+-&move=2.5"