Nation IN BRIEF : PENNSYLVANIA : Chess Champion to Take On Computer

World chess champion Garry Kasparov will sit down across from an invisible opponent that can master a move no human can accomplish: shifting through 200 million possible chess maneuvers per second. The challenger is Deep Blue, a formidable computer foe devised by IBM. The duel will be the first to pit man against machine for a regulation, six-game chess match. The match in Philadelphia is being sponsored by the Assn. of Computing Machinery, which held the first computer competition in 1970. The winner will receive $400,000 and the loser $100,000 provided by the Assn. for Computing Machinery.