The ultimate chess database, analysis and playing program for the Apple MacSuitable for all players from beginners to the World Chess Champion with human-like playPlatform: Intel based Apple Mac™ OS X 10.6 (Snow Leopard), 10.7 (Lion) or 10.8 (Mountain Lion)Playing ability: Beginner (750 Elo) up to World Chess Championship strength and beyond (3200+ Elo)†Languages: English, French, German, Italian, Polish, Portuguese, Russian and Spanish