This Grandmaster chess set gives you the feeling of true tournament play - and even teaches you how to play at that level! Now you can enjoy a challenging game of chess even when your opponent plays at a completely different level than you do. This Grandmaster board has advanced equalization technology that gives either player hints and the option to receive threat warnings or recommended moves. Features a tournament sized vinyl surface with auto sensory technology, weighted pieces with 3-1/2" tall king, dual LCD displays and clocks, 32-play take-back, one/two player modes, 100 levels of play, five teaching modes and more. 4 'AA' batteries (not included). 20" square.