Ruy Lopez - Bird's defence - Paulsen variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O Ne7
White plays the king's pawn to e4. Black plays the king's pawn to e5. White develops the knight to f3.
Black develops the knight to c6. White develops the light-squared bishop to b5. Black transfers the knight to d4.
White captures with the knight on d4. Black captures on d4 with the king's pawn. White castles kingside.
Black jumps the knight to e7.