[IMG]http://d.yimg.com/a/p/afp/20100429/capt.p***o_1272519856375-1-0.jpg?x=130&y=86&q=85&sig=Iu9BV_N_vq6BUPuoRjks.g--[/IMG]AFP - India's defending champion Viswanathan Anand took the lead Thursday after decisively winning the fourth game of his 12-game match for the world chess title against Bulgarian challenger Veselin Topalov.
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