The Steinitz Defense is a chess opening that arises after the moves 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6. Named after the first World Chess Champion, Wilhelm Steinitz, this defense is a variation of the Ruy Lopez opening. It aims to solidify the pawn structure and prepare for a counterattack, allowing Black to develop pieces harmoniously. In the Steinitz Defense, Black often seeks to maintain a strong center while avoiding weaknesses. The move 3...d6 supports the e5 pawn and prepares for further development, such as ...Nf6 and ...Be7. This setup can lead to rich strategic battles, emphasizing solid play and careful maneuvering.