Shaturanga, an early form of chess, was invented in northern India around 600 AD and had 4 players controlling infantry, boatmen, cavalry, and elephants. It later evolved into Shatranj in 650 AD after reaching Arabia, becoming a 2 player game without dice. Shatranj then spread to Europe, reaching Spain by the 11th century, and evolved further into the modern European form with changes like 2-square pawn moves, castling, and the queen becoming the most powerful piece. Other international variations developed as well, such as Chinese, Japanese, Burmese, and Korean chess.