The classic game of chess.
Features:
* 3d or 2d boards.
* Play against the computer or against another human.
* Can toggle view in 3d or 2d in two-player mode.
* Three difficulty levels for the computer.
* Undo unlimited moves.
* Possible to switch board mid-game.
* Make moves by drag & drop OR by clicking on the piece and selecting its destination.
* Visualizes the thinking process of the computer (on higher levels).