On a high after two big wins, five-time world champion Viswanathan Anand will take on former challenger and in-form Vladimir Kramnik of Russia in the fourth round of the Candidates chess tournament in Russia.Starting with a fine victory over Levon Aronian of Armenia, an easy draw against Veselin Topalov of Bulgaria and a win against Shakhriyar Mamedyarov of Azerbaijan has put Anand in front of the eight-player pack on 2.5 points from three games. Eleven rounds are still to come in the event that will decide the challenger for Magnus Carlsen for the next World championship match.Sunday brings the first of the four rest days and it will give Anand a chance to get some rest before he takes on the Russian brigade in the next four rounds.Starting with Kramnik, Anand will meet Dmitry Andreikin and Sergey Karjakin before the second rest day arrives.