Reti - Lisitsin gambit deferred
1. Nf3 f5 2. d3 Nf6 3. e4
White develops the knight to f3. Black plays the f-pawn to f5. White plays the queen's pawn to d3.
Black develops the knight to f6. White moves the king's pawn to e4.
White develops the knight to f3. Black plays the f-pawn to f5. White plays the queen's pawn to d3.
Black develops the knight to f6. White moves the king's pawn to e4.