For the second year in a row, at the University of the Sciences Athletic Recreation Center, more than 300 Philadelphia youth from at least 20 different schools across the region competed in more than ...
来自MSN

Hook Mating Pattern

The hook mate is a checkmate pattern in chess where a rook delivers the checkmate, defended by a knight, and the knight is protected by a pawn (or other piece). Taliban reacts to Trump's Afghan base ...