The 37-year-old Indian ace emerged triumphant after drawing with Hungarian Peter Leko in the final round of the tournament, which he dominated from the start.
Eight of the world's best chess players participated in the 14-day tournament, which had US $390,000 as the champion's purse.
Anand had previously won the World Championship in 2000, but the achievement was valued less since at the time the chess world was split between two rival world titles.
Last month Anand won the World Rapid Chess title after defeating Armenia's Levon Aronian in a cautiously-played final in Mainz, Germany [ Images ].
- Join us in congratulating the king of the 64 squares board.