The Ruy López opening is a popular chess opening that begins with the moves 1.e4 e5 2.Nf3 Nc6 3.Bb5. Named after the Spanish priest Ruy López de Segura, this opening aims to control the center of the board and develop pieces efficiently. It is known for its strategic depth and has been played by many world champions. In the Ruy López, White puts pressure on the knight at c6, which indirectly attacks the e5 pawn. This opening can lead to various variations, including the Morphy Defense and the Berlin Defense, each offering different strategic ideas and plans for both players.