Benko Gambit
A59 · Played as black · Intermediate · Indian Defences
One pawn for two open files and pressure that never, ever stops
The main line
1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 Bxf1 8.Kxf1 g6 9.g3 Bg7
Strategic ideas
- Give up a pawn to open the a- and b-files permanently
- Double rooks on the queenside and squeeze — the pressure outlasts the pawn
- Fianchetto on g7 so the bishop joins the queenside attack down the long diagonal
- Force White's king to f1 by trading on f1 before White can castle
- Play the rare gambit whose compensation is positional and lasts into the endgame
Key themes
- Positional — Unusually for a gambit, the compensation is structural and permanent rather than a passing attack
- Open Files — The a- and b-files open on move five and Black's rooks own them for the rest of the game
- Counterattack — Black cedes the centre entirely and generates all the play on the queenside
Typical plans
Most gambits buy a fleeting attack; the Benko buys a permanent one. Black sacrifices a pawn to rip open the a- and b-files, then piles the rooks and the g7 bishop onto White's queenside and never lets go. The remarkable part is that the compensation survives into the endgame — trading queens doesn't help White at all, which is the exact opposite of every other gambit in this library. White's extra pawn is on the kingside where it does nothing for a very long time.
Move by move
- d4 — White claims the centre.
- Nf6 — Black develops and controls e4 with a piece.
- c4 — White grabs space and prepares Nc3.
- c5 — Black hits d4, heading for Benoni structures.
- d5 — White pushes past, closing the centre.
- b5 — Black plays the Benko. The pawn is genuinely free, and it's being offered to open two files that will never close.
- cxb5 — White takes.
- a6 — Black offers the second pawn, insisting on the open files.
- bxa6 — White takes again — declining is a serious option, but accepting is the honest test.
- Bxa6 — Black recaptures with the bishop, hitting the loose f1-bishop and opening the a-file for the rook.
- Nc3 — White develops and defends.
- d6 — Black shores up c5 and e5, and now every black piece has a natural square.
- e4 — White builds the centre — the extra pawn is on the kingside, so the centre is where it has to pay off.
- Bxf1 — Black trades on f1, denying White the right to castle.
- Kxf1 — White must recapture with the king. It'll take several moves to get the king safe and the h1-rook into play — that's part of what the pawn bought.
- g6 — Black prepares the fianchetto.
- g3 — White prepares to walk the king to g2 and untangle.
- Bg7 — Black completes the fianchetto. The bishop hits d4 and the long diagonal, the rooks are coming to a8 and b8, and the pressure lasts all game — even into the endgame. That's the Benko.