Ruy Lopez - Berlin defence - hedgehog variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7
White advances the king's pawn to e4. Black moves 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 f6.
White castles kingside. Black pushes the queen's pawn to d6. White pushes the queen's pawn to d4.
Black develops the light-squared bishop to d7. White jumps the knight to c3. Black moves the dark-squared bishop to e7.