Put Dallas Stewart in front of a chessboard, and you know that he'd almost always rather corner the king, with a potential checkmate scenario, than turn around and strike out a mere pawn or two. Sure enough, Wednesday the trainer announced that connections have agreed to go on the attack with Chess Chief (Into Mischief)--even though taking up an invitation for the GI Pegasus World Cup, at Gulfstream Jan. 29, entails renouncing a "home game" this weekend. Chess Chief has developed a remarkable affinity for the Fair Grounds, scene of...