Chess King with Houdini 2 NOTE: There are new versions CHESS KING 2, 3, 4 and 4 Pro also on Amazon If you bought this Chess King [1] after 3-1-13, write Chess King for free upgrade! Analyze your chess games with Houdini 2, Includes 5 million game GigaKing Database Prepare for your opponent, opening and custom trees, 1500 puzzles and 100+ quest games Classical and random playing modes, hundreds possible levels of play