d.f.g ChessExpert XP is a friendly chess partner for beginners to professionals.It is considered one of the most reliable tactical programs. The operation is clear and elementary, while simultaneously giving you a big number of features.It will look ahead 5 or 6 moves with alpha-beta pruning. It has selectable bord kinds, moves made with the mouse, records each move, scrolling forward and backwards, undo, editit function, save and restore games