The Expert Travel Chess Computer"s aproximate rating is 2200, making it the strongest travel chess computer around! Garry Kasparov, the 13th World Chess Champion, has been personally associated with Saitek since 1983, and gives his much coveted endorsement to the Mephisto range of chess computers.Without a doubt Saitek"s strongest portable chess computer. Strength combined with many advanced features makes this the ultimate compact computer available for the expert chess player. Playing Options: user-selectable Search Algorithms for customization Self Study Options: Setup positions; all major openings and Grandmaster moves stored; plus extra insight through Info Mode. Compact Design: compact laptop style case; flip down lid, pieces storage area and integrated LCD screen. Powered by 4 AA batteries (not included).