Five-time world champion Viswanathan Anand suffered a shocking loss against Sergey Karjakin of Russia in the fourth round of Candidates Chess tournament in Moscow yesterday. The loss, coming in after a fine start that started with a victory over Topalov and two draws, put Anand on the back-foot in the biggest challenge of this year. With his first loss in four games, Anand slipped back to a fifty percent score while Karjakin rose to be on three points out of a possible four.