GM\Anand Strikes Again With The Catalan And Leads 2.5:1.5

GM\Anand played a magnificent game where he sacrificed a knight on move 23 which left Topalov's king exposed.Chess experts praised this game a lot.
The souce of the photo :http://www.anand-topalov.com/en/gallery_game4.html
Live commentary on: http://susanpolgar.blogspot.com/2010/04/anand-topalov-g4-live-commentary.html