This game has had almost the same rules since 1475. The first moderne tournament was held in 1851. Which game?

Explanation

Chess is a very popular two player board game. The aim of the game is to win by putting your opponent in checkmate. You have to attack your opponent's king so that the attack can't be averted. The ancestor to chess is told to be Chaturange. This game was played in the North Western India in the 6th century. The game has almost had the same rules since 1475 and the first modern chess tournament was held in 1851 in London.