Colossus Chess X

This fully fledged program understands all the rules of chess including, underpromotion, the fifty move rule and draws by repetition, it can achieve the king-bishop-knight mate. The new features are a modifiable opening book of 11000 moves, the program also learns new lines of play from playing experience. You can also play against the clock, try a blindfold mode or use the program to solve mating problems. Apart from the standard 2D board there's a 3D one, which can be freely rotated. Four graphical chess piece sets available, music & speech, demonstration mode.