Philidor - Nimzovich - Sokolsky variation
1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Nbd2
White moves the king's pawn to e4. Black moves the king's pawn to e5. White develops the knight to f3.
Black pushes the queen's pawn to d6. White advances the queen's pawn to d4. Black develops the knight to f6.
White captures on e5 with the queen's pawn. Black captures with the knight on e4. White jumps the knight to d2.