Benko Gambit

After White accepts with cxb5 and Black plays ...a6, the main structures appear quickly. Black develops the bishop to g7, places rooks on the a- and b-files, and turns the queenside into a permanent source of pressure.

White has central space and an extra pawn, but development can be awkward and the queenside pawns become targets. The Benko rewards clarity of plan: Black wants open-file pressure and piece coordination, while White must consolidate before the extra material counts.

For practical purposes the Benko is one of the most reliable fighting choices against 1.d4. Black's plans are intuitive and the pressure often sustains itself deep into the middlegame and even after queen exchanges.

White players should focus on completing development cleanly and avoiding passive defence of the b- and a-pawns. The most successful approaches tend to return material early in exchange for active piece play and a secure centre.

The critical line is 4.cxb5 a6 5.bxa6 Bxa6, where White accepts the gambit and Black develops rapidly with pressure on the a- and b-files. The accepted variation is by far the most common at all levels.

White can also decline with 4.Nf3 or 4.a4, keeping the extra pawn but giving Black the structural imbalance without needing to prove full compensation. The declined lines tend to lead to slower, more positional games.

Also known as the Volga Gambit, the opening became especially associated with Pal Benko, whose analysis and practical success in the 1960s and 1970s helped establish it as a serious fighting defence.

The Benko Gambit has remained popular because it offers Black a clear identity against 1.d4: active piece play and winning chances without drifting into the slower structures of many other queen's-pawn defences.