ThinkFun has created All Queens Chess, a unique strategy game that combines the rules of chess with the logic of tic-tac-toe. All of the game pieces are powerful queens that can’t be captured and as rules require, must be treated with appropriate respect at all times.
Just be aware of the ‘All Queens’ etiquette. You cannot knock another queen off an occupied space and you cannot jump over a queen.
via The Awesomer