Theoria
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Queen's Gambit Accepted

Central Variation, Rubinstein Defense, Yefimov Gambit

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  1. 1.d4d5
  2. 2.c4dxc4
  3. 3.e4c5
  4. 4.d5b5
254 games56%41%

An offbeat line of the Rubinstein Defense in which Black supports the extra c4-pawn with 4...b5, a queenside grab that engines judge favorable to White.

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About the Yefimov Gambit

The Yefimov Gambit, 4...b5, reinforces Black's extra pawn on c4 with the b-pawn rather than letting White regain it with Bxc4. The result is a queenside pawn chain facing White's d5–e4 center. The most common reply, 5. a4, strikes at the chain immediately. The second choice, 5. Nc3, develops a piece and also bears on b5. The line is seldom played. The engine gives White a clear advantage, and White scores well in online games.

Popular continuations