Chess King Standard with Houdini 2 (new 2015 version) Grandmaster engine Houdini 2 for Chess King Huge opening tree with evaluations and success for each move GigaKing 2015 games database over 6 million games, Prepare for your opponent, opening and custom trees Classical (any level), Random, Puzzle (1500 puzzles) and Quest modes (100 games) Both Windows and Mac versions included on DVD