Alekhine's defence - four pawns attack - Trifunovic variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 Bf5
White plays the king's pawn to e4. Black develops the knight to f6. White moves the king's pawn to e5.
Black jumps the knight to d5. White moves the queen's pawn to d4. Black advances the queen's pawn to d6.
White advances the c-pawn to c4. Black jumps the knight to b6. White moves the f-pawn to f4.
Black develops the light-squared bishop to f5.