By Elaine Donnelly
Extending sexual misconduct to combat units

Holding off a battalion of younger challengers, a pair of well-seasoned veterans secured the top places on the chess leaderboard at the 40th World Open, which wrapped up Sunday at its traditional home in Philadelphia.

The action already is intense at the 2011 U.S. Championship tournament, which kicked off play Friday at the Chess Club and Scholastic Center of St. Louis. Two dozen of the country's top players, including defending champ GM Gata Kamsky, are in the hunt, with a two-game championship match between the two top finishers to be held April 26 and 27.