Bilbao, Spain, Sep 6 (UNI) World Champion Viswanathan Anand received a shocking defeat at the hands of Veselin Topalov of Bulgaria as the Indian resigned in just 25 moves to slip further down the ladder in the fourth round of the Bilbao Grand Slam final chess tournament here.
In the other games of the day, Levon Aronian of Armenia defeated Vassily Ivanchuk of Ukraine and Magnus Carlsen, still ailing from his Moscow bug, defeated Teimour Radjabov yesterday.
However, Topalov still leads the chart with eight points followed by Carlson with seven points while Aronian is at the third spot on five, two points clear of nearest rivals Radjabov, Ivanchuk and Anand, all of whom yet to register a single victory.
The Indian looked completely out of sorts as Topalov, in a Queen's Indian defense game, forced Anand to take a backseat very early the game.
Topalov went for a popular set-up involving a pawn sacrifice early in the opening and the Indian's passive play with black pieces resulted in a huge spatial advantage for the Bulgarian.
Anand failed to get going against a resurgent Topalov after his previous round victory over Carlsen and out-think the Indian to trap him with his game plan.
Finally, Anand succumbed to his rival's moves and surrendered after just 25 moves to temporarily lose his number one position.
In another match, Carlsen scored comprehensive victory over Radjabov who employed the Sicilian Dragon as black.
Playing according to the position, Carlsen launched a king size attack and tackled Radjabov's pieces effectively on the other flank to take the game in 37 moves.
The longest game of the day, however, was won by Aronian against Ivanchuk who looked out of place and failed to find the best defensive resources.
It was a Queen's gambit accepted in which Ivanchuk was saddled with an isolated pawn in the endgame and Aronian wove a brilliant web on both flanks to show his class to finish the game in 70 moves.
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