Blackmar-Diemer gambit
1. d4 Nf6 2. f3 d5 3. e4
White plays the queen's pawn to d4. Black develops the knight to f6. White advances the f-pawn to f3.
Black advances the queen's pawn to d5. White plays the king's pawn to e4.
White plays the queen's pawn to d4. Black develops the knight to f6. White advances the f-pawn to f3.
Black advances the queen's pawn to d5. White plays the king's pawn to e4.