Chess Openings Lab
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Slav Defense: Geller Gambit

The Geller Gambit is 4...dxc4 5.e4, where White builds a big center and lets Black keep the c4 pawn for now. Black holds the pawn with 5...b5, while White wants e5, quick castling and play against Black's queenside chain with a4.

Moves
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4
ECO
D15
Engine
−0.16 · level (Stockfish 17.1, depth 20)
Played
414 games in our lichess sample
White scores
52.1%

Key ideas for both sides

White

  • Push e5 to kick the f6 knight and gain kingside space, then castle and bring the rooks to the center.
  • After 5...b5, develop with 6.Be2 and 7.O-O, then hit the chain with 8.a4 and b3 as the engine line shows.
  • If Black plays 5...Bg4 or 5...e6, simply recapture with Bxc4 and enjoy a strong center.
  • Keep the d4 and e4 pawns side by side; they are White's whole compensation for the pawn.

Black

  • 5...b5 is the only move that keeps the balance: it protects c4 and gains queenside space.
  • Follow with ...e6, ...Bb7 and ...a6, building a solid shell around the extra pawn.
  • Against a4, answer with ...a6 so the b5 pawn stays supported by a pawn.
  • Avoid 5...e6 and 5...Bg4, which let White regain c4 for free with Bxc4.

Plans and pawn structure

White has a classical e4 and d4 center for the c4 pawn. Black's queenside pawns on b5 and c4 are the counterweight. White plays e5, Be2, O-O and then a4 and b3 to break the chain. Black defends with ...e6, ...Bb7, ...a6 and later ...c5 to challenge d4. If Black's chain survives, the extra pawn tells; if White breaks it while keeping the center, White's pieces take over.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position −0.16: level. Its three top choices for Black:

  1. −0.16 5...b5 6.Be2 e6 7.O-O Bb7 8.a4
  2. +0.85 5...Bg4 6.Bxc4 e6 7.O-O Be7 8.Be3
  3. +1.36 5...e6 6.Bxc4 b5 7.Bd3 b4 8.Ne2

Pawns, from White's side.

How it scores on lichess

414 rated lichess games reached this position; White scored 52.1%.

1200–159961.0%
1600–199954.4%
2000 and up48.8%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

How to play against it

As Black, play 5...b5 at once and follow with ...e6 and ...Bb7. Do not let White take back on c4 for free. If White pushes e5, put the knight on d5 and look for ...c5 to hit d4 and open the long diagonal for your bishop.

Other lines with this name

The lichess opening list also files this line under the same name, though it reaches a different position: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4 b5 6.e5.

Questions

What are the moves of the Slav Defense: Geller Gambit?

The Slav Defense: Geller Gambit starts 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4. Its ECO code is D15.

Is the Slav Defense: Geller Gambit good for White?

Stockfish 17.1 rates the position −0.16 at depth 20, which is level. In 414 lichess games from our sample, White scored 52.1%. Exciting for White players who like a big center; Black needs to know 5...b5 to avoid a poor game.

What is the main idea of the Slav Defense: Geller Gambit?

White lets Black keep the c4 pawn and builds a broad center with e4 and d4. Black must hold with ...b5 and a solid setup, while White breaks the chain with a4.

What should Black play next?

The engine's first choice is b5, with Bg4 and e6 close behind. 5...b5 holds the c4 pawn and keeps the balance against White's center.

Updated October 2026. Sources and method.