Chess Opening Theory/1. e4/1...b5

O’Neill Gambit
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/p1pppppp/8/1p6/4P3/8/PPPP1PPP/RNBQKBNR w
Moves: 1.e4 b5
ECO code: B00
Parent: King's Pawn Opening

O'Neill Gambit

1...b5?

This is considered a dubious response to 1. e4 because it allows 2. Bxb5, and if White plays accurately, Black does not get sufficient compensation for the sacrificed b-pawn. As a result, the O'Neill gambit is almost never used, and is the least played response to 1. e4. Despite this, there is some try for an advantage with the Lila Attack, where if white does not play carefully they could end up severely disadvantaged.

1. e4 b5 2. Bxb5 Bb7 3. Nc3 f5!?

And here, if white plays 4. exf5? black wins the rook with 4... Bxg2.

Theory table

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

1. e4 b5

	2
O'Neill Gambit Accepted	Bxb5	+

External links

• 365Chess. [1]