LINARES, Spain -- On one side, the kid, dressed in black but baby-faced and fidgety. On the other, his opponent: the icy, scowling chess eminence Garry Kasparov. Against all odds, Teimour Radjabov, 15, beat Kasparov, the world's top-ranked player, although the teen did benefit from a Kasparov blunder as the champ looked poised to win. That duel of David and Goliath -- culminating in Kasparov's failure to shake Radjabov's hand afterward -- was a highlight of the Linares Chess Tournament, sometimes called the Wimbledon of chess.