Chess originated from the Indian game of chaturanga before the 600s AD. It evolved into the game we know today around the 16th century and was originally reserved for royalty. Some of the earliest masters included Ruy Lopez, a Spanish priest. The first international tournament was held in London in 1851 and was won by Adolf Anderssen of Germany. Paul Morphy was the first great American player, traveling to Europe in the 1850s where he defeated all challengers. The first official world championship was in 1866 and was won by Wilhelm Steinitz, who became the first official world champion. In 1997, the computer Deep Blue became the first computer to defeat a reigning world champion in a match.