Former world champion Viswanathan Anand will take on Russian Sergey Karjakin in the Round 4 of Candidates Chess tournament, in Moscow today. Anand is presently in joint lead with Karjakin and Armenian Levon Aronian with eleven rounds still to come in the tournament. Earlier Anand drew his games with Aronian and America's Fabiano Caruana following a victory over Veselin Topalov of Bulgaria in the first round. The candidate tournament will decide the challenger to current world champion, Magnus Carlson of Norway for the world chess championship planned in November at New York.