Benko Gambit

Key ideas for both sides

Plans and pawn structure

In the accepted lines Black trades the light-squared bishops on a6 or f1, castles and stacks the queen and rooks on the a- and b-files. White's job is to hold the a- and b-pawns, often with Nd2, Qc2 and a rook on b1, and then use the extra pawn in the center with e4 and e5 or in the endgame. If Black runs out of targets, White's material edge usually decides. In the declined lines the game is closer to a normal Benoni.

What the Benko Gambit is about

After 1.d4 Nf6 2.c4 c5 3.d5 b5 Black offers a pawn on the queenside. If White accepts with 4.cxb5 a6, Black wants to open the a- and b-files. After 5.bxa6 Bxa6 the bishop on a6 trades off White's light-squared bishop or keeps the king from castling easily. Black then fianchettoes on g7 and lines up the rooks on a8 and b8.

The pawn is a long-term investment. Black does not get a quick attack, but steady play against a2 and b2 that can last into the endgame. Across 1600 games from this position White scored only 45.4%, a good result for Black, even though the engine prefers White after accepting.

The main variations

The Benko Gambit Accepted, 4.cxb5 a6, is the main path. White then has several choices, each with a different idea.

The Fully Accepted Variation, 5.bxa6, takes the second pawn too. Black recaptures with ...Bxa6 and gets the full Benko setup: ...g6, ...Bg7, ...d6 and ...O-O. White scored 49.1% here.

The Zaitsev System, 5.Nc3, develops first and lets Black take on b5. White aims for e4 and a later a4 to fight for the b5 square. White scored 47.9%.

The Modern Variation, 5.e3, is the engine's first choice. White develops and can give the pawn back for smooth play; the engine line continues 5...e6 6.dxe6 fxe6 7.Nc3 Be7. White scored 54.6%, the best among the main lines.

The Pawn Return Variation, 5.b6, hands the pawn back at once to keep the queenside closed and spoil Black's plans. Black usually recaptures with ...Qxb6 or plays ...e6.

Typical plans for White

In the accepted lines White holds the extra pawn and finishes development. If the bishops are traded on f1, White often plays Kxf1 and then g3 and a king step to g2 to tuck it away. Pieces go to d2, c2 and b1 to cover the queenside.

The center is White's play. With e4 in place, the e5 push can open lines toward Black's king while Black's pieces are on the queenside.

• Keep the b3 and c4 squares under control; Black's knights want them.
• Trade pieces when possible. Each trade makes the extra pawn more important.
• Against the declined lines, Nf3 and Qc2 keep things simple and solid.

Typical plans for Black

Black builds the standard setup: ...Bxa6, ...g6, ...Bg7, ...d6, ...O-O, a knight to d7, then the queen to a5 or b6 and the rooks to a8 and b8. The g7 bishop on the long diagonal also hits b2.

The knights look for c4, b4 and b3. Black often plays ...Ne5 or ...Nb6 to reach c4. Black wants to win back the pawn on a2 or b2 under good conditions, or keep pressing until White's pieces get tied down.

• Do not hurry. The attack on a2 and b2 does not run away, and patience is the Benko's strength.
• Watch for e4 and e5 from White; keep a piece ready to meet it.

Mistakes club players make

• Black trying for a quick attack. The Benko is a long positional gambit. Throwing pawns forward on the kingside usually only creates weaknesses.
• White grabbing and then sitting still. If White does not use the center, Black's grip on the queenside grows move by move.
• Letting a knight reach c4 or b3. From there it attacks a key pawn and often decides the game.
• Trading Black's g7 bishop for nothing. It is the piece that makes the attack on b2 and a1 work.

Who should play it

The Benko suits patient Black players who understand long-term compensation. The plans are easy to learn and repeat in many games, so it works well at club level. Many opponents also do not know how to handle the accepted lines, and the long-term queenside play can be hard to defend over the board. Players who like endgames will find that the queenside play often lasts even after the queens come off.

For White, 5.e3 is a safe practical answer, while the Fully Accepted lines test whether Black's compensation is enough. Declining with 4.Nf3 or 4.Qc2 is fine if you want to avoid the gambit altogether.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.73: a slight edge for White. Its three top choices for White:

1. +0.73 4.cxb5 a6 5.e3 e6 6.dxe6 fxe6
2. +0.50 4.Qc2 bxc4 5.e4 e6 6.Nc3 Be7
3. +0.38 4.Nf3 Bb7 5.Bg5 Ne4 6.h4 g6

Pawns, from White's side.

How it scores on lichess

1,600 rated lichess games reached this position; White scored 45.4%.

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

Variations of the Benko Gambit

• Benko Gambit Accepted4.cxb5 · 1,322 games
• Bishop Attack4.Bg5 · rare
• Hjørring Countergambit4.e4 · rare
• Main Line4.Nf3 · rare
• Pseudo-Sämisch4.f3 · rare
• Quiet Line4.Nd2 · rare
• Sosonko Variation4.a4 · rare

How to play against it

As White, the simplest way is to accept and play for e4. The engine's first choice is 4.cxb5 a6 5.e3, which can return the pawn for fast development. If you dislike defending the queenside, 4.Nf3 and 4.Qc2 decline the gambit. Avoid weakening b3 and c4; that is where Black's knights want to land.

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 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bxa6 7.e4 Bxf1 8.Kxf1 d6 9.g3.

Questions

Updated October 2026. Sources and method.