World champion Viswanathan Anand retained his crown winning the World Chess Championship title by wrapping up the final game against Veselin Topalov of Russia at Sofia, Bulgaria . Anand achieved an improbable win playing with black in the final game to retain the world title by 6.5-5.5 margin after the end of the 12th and final game. Talking to reporters, the proud father of the chess wizard Viswanathan Iyer said, it was Viswanathan Anand's dogged persistence that played a major role in his retaining the World Champions title.