Former chess World Champion Garry Kasparov makes a move against Anatoly Karpov during an exhibition rematch in Valencia, Spain, Thursday, Sept. 24, 2009. Chess eminences Kasparov and Karpov are dusting off their knights and pawns for an exhibition rematch marking the 25th anniversary of their first title bout, a grueling one that lasted five months and was eventually halted.

First published in the March 29, 2011, 10:56 a.m. edition

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