Indian grandmaster Viswanathan Anand has suffered a shock defeat with White pieces against Vladimir Kramnik of Russia in the seventh round of the Tata Steel Masters chess tournament. In the event being held at Wijk Aan Zee in The Netherlands, Anand went for unwarranted complications against Kramnik who was at his best to match his opponent. With the defeat, Anand's quest for a record sixth title also suffered a setback.He slipped to joint sixth spot from his overnight joint second position.Shakhriyar Mamedyarov of Azerbaijan stretched his lead to a full point after his third straight victory in the tournament. He defeated Wei Yi of China. Top rated Magnus Carlsen converted a full point against Yifan Hou of China, the highest ranked woman player.With six rounds still to come, Mamedyarov is sitting pretty on Five and Half points out of a possible seven and is now followed by Anish Giri of Holland, Wesley So of United States, Carlsen and Kramnik who all have 4.5 points each.With Four points, Anand shares the sixth position along with Sergey Karjakin of Russia.