16. Danube Gambit (3...c5 4.d5 b5!?)
The Danube Gambit applies Benko Gambit concepts to the King's Indian. Black offers the b5 pawn to open the a and b files, trades light-squared bishops on e2, and offers Queen trades with ...Qa6.
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 c5 5.d5 b5 6.cxb5 a6 7.bxa6 O-O 8.e4 Qa5 9.Bd2 Bxa6 10.Be2 d6 11.O-O Bxe2 12.Qxe2 Qa6
Move by move
- 1.d4 – White occupies the center with the Queen's pawn: it controls e5 and c5 and paves the way for the c1 Bishop and the Queen.
- 1...Nf6 – Black develops the Knight and controls e4 and d5: it prevents an immediate 2.e4 and prepares the King's Indian setup.
- 2.c4 – White gains central space with the c-pawn: it controls d5 and prepares Knight development to c3.
- 2...g6 – The signature move of the King's Indian: Black prepares the fianchetto of the Bishop on g7 to target the center from afar.
- 3.Nc3 – White develops the Knight toward the center: it protects d5 and prepares full central conquest with e2-e4.
- 3...Bg7 – The Bishop takes position on the long h8-a1 diagonal: it controls the central d4 and e5 light squares and shields the King.
- 4.Nf3 – White develops the Knight toward the center before settling on a permanent pawn formation.
- 4...c5 – Black unleashes a counterattack with ...c5, offering transpositions toward Benoni or Benko structures.
- 5.d5 – White pushes d5 to retain spatial dominance in the center and halt Black's central play.
- 5...b5 – The Danube Gambit: Black sacrifices the b5 pawn in Benko fashion to open queenside files.
- 6.cxb5 – White accepts the challenge and takes the b5 pawn, opening lines for Black's pieces.
- 6...a6 – Black persists with ...a6 to complete the sacrifice and clear the a and b files for Rooks.
- 7.bxa6 – White also captures on a6, pocketing the pawn but opening attack highways for Black's minor pieces.
- 7...O-O – Black completes kingside castling, sheltering the King before beginning recovery and siege operations.
- 8.e4 – White takes the center with e4 to bolster d5 and open the diagonal for the f1 Bishop.
- 8...Qa5 – The Queen comes out to a5 pinning the c3 Knight and preparing dynamic reclamation of initiative.
- 9.Bd2 – The Bishop interposes on d2 to break the pin on the c3 Knight and defend the King.
- 9...Bxa6 – Black develops the light-squared Bishop by capturing on a6, proposing minor piece trades.
- 10.Be2 – The Bishop develops to e2 preparing kingside castling and protecting the King in the center.
- 10...d6 – Black consolidates the pawn structure, guarding e5 and clearing the d7 square for the Knight.
- 11.O-O – White finally secures the King with kingside castling and connects the Rooks.
- 11...Bxe2 – Black trades bishops on e2, eliminating White's key light-squared central defender.
- 12.Qxe2 – The Queen recaptures on e2, maintaining defense of the e4 pawn and controlling the rank.
- 12...Qa6 – The key move: Black proposes trading Queens to enter an endgame where pressure on the a and b files easily compensates the pawn.
How to exploit the position
Black has sacrificed a pawn for excellent piece coordination typical of the Benko Gambit: the a6 Queen offers an exchange to enter a favorable endgame with pressure on the a and b files.
- Propose queen trades with 13.Qxa6 Nxa6: in the endgame Black Rooks will dominate the semi-open a and b files.
- Develop the b8 Knight to d7 to maneuver to b6 or c4, targeting the weak a2 pawn.
- Utilize the g7 Bishop which sweeps the long diagonal unobstructed, putting pressure on c3 and e4.
- Place Rooks on a8 and b8 to create a persistent siege against White's backward pawns.
Master tips
Benko-style counterplay in the Danube Gambit
By sacrificing the b5 pawn, Black purchases enduring activity on the a and b files and strips White of central initiative.