Anand..He retains the world champion title. Congratulations.
http://gambit.blogs.nytimes.com/2010/04/28/anand-wins-again-to-lead-world-championship/
Viswanathan Anand, the world champion, used a blistering attack to win the fourth game of his title match against Veselin Topalov of Bulgaria on Wednesday. He now leads the best-of-12 match 2.5 points to 1.5.
It was the second win by Anand, both times in games where he had White. As in Game 2, he chose the Catalan, an opening long favored by Vladimir Kramnik, the former world champion who won a memorable, and acrimonious match against Topalov in 2006. Though is might be amusing to assume that Anand has chosen the opening for psychological reasons (play the opening of Topalov’s greatest nemesis), it is more than likely that Anand selected the opening in his pre-match preparations because he decided that it did not suit Topalov’s style.
In Game 4, Topalov varied his response to the Catalan from Game 2 and, as in that game, achieved a reasonable position out of the opening. But, as in Game 2, Topalov committed a couple of mistakes. Whereas in Game 2, Anand was able to grind Topalov down, this time, Topalov’s errs were more serious and left his king without adequate protection. Anand quickly capitalized, launching a vicious attack. Within a few moves, Topalov was completely lost and he resigned.
Topalov now has to be worried. Though he is only behind one point (a win is worth one point, a draw is worth a half), he has lost both games that he has played Black, while Anand easily drew Game 3, when he last had Black. Since Thursday is a rest day, it gives Topalov time to regroup. The match resumes Friday with Game 5.