Chess Opening Theory/1. d4/1...g5/2. Bxg5

Borg Gambit Accepted
a b c d e f g h 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 a b c d e f g h
Position in Forsyth-Edwards Notation (FEN) rnbqkbnr/pppppp1p/8/6B1/3P4/8/PPP1PPPP/RN1QKBNR b
Moves: 1. d4 g5 2. Bxg5

2. Bxg5: Borg Gambit Accepted

First Impressions

After accepting the Borg Gambit with Bxg5, White has gained a pawn as well as developed the queenside bishop. Obviously, this puts Black at a disadvantage, as White is now leading in development. Black has three main options here: Play the better move Bg7 and commit to a pseudo-Indian defense, c5 to try to destabilize the center and let the queen out, or try to kick the bishop out with f6.

2... c6

c6 has an interesting idea, over all this move seems like it does nothing, but there is an hidden idea, many people play the move 3. e3??, which after the move c6 is considered a blunder, since black has the strong double attack Qa5+, checking the king and attacking the bishop, normally the bishop could come back to d2 but since white played e3, they will continue the game without a bishop

2... Bg7

Bg7 prioritizes development over central control, and is considered better by masters and computers alike. This move aims to get quick development up in exchange for gambiting the g pawn. White can fight back by expanding in the center and developing their own pieces, leading to a rather quick race for who can develop their pieces the fastest. This gambit is usually considered not justified.

2... c5

The intent of c5 has two reasons. First, it is to destabilize White's center pawns and force them to respond lest they lose space by a center pawn being taken by a flank pawn. Secondly, it is to let the queen out, which can help destabilize the center or hunt the b2 pawn. This also develops a piece, getting a bit of advantage back for Black.

2... f6?

f6 attempts to kick away the bishop and expand in the center with an eventual e5, but this can be refuted with 3. e4!, saving the bishop for 1 turn and making some center space. If Black tries to take the bishop, the White queen can go to h5 for a quick checkmate. Overall, this line is considered inferior to Bg7 by masters and computers.

Other options

Black can also play Nf6 to develop the kingside knight, however after Bxf6, there are doubled pawns on the f file and there is a clear line of sight to the king which can be exploited since the kingside pawns are weak.

Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation.

1.d4 g5 2.Bxg5

	2	3	4
	... Bg7	e4 c5	c3 cxd5	⩲ (White has the upper hand)
	... c5	c3 Qb6	Nf3 Qxb2	⩲ (White has the upper hand)
	... f6	e4! fxg6??	Qh5#	+ −1-0 (Checkmate- White Won)
	... c6	e3?? Qa5+!		Black is better