A: For serious chess players, there are at least three programs to consider: Rybka, Fritz and Shredder. All come in standard versions for $70 to $75, as well as more powerful "deep" versions that ...

The drawback of this approach went on spectacular display last year in a computer-versus-computer match in the Netherlands pitting a strong PC-based commercial chess program called Shredder ...

In addition to the outstanding playing strength of the 12 times computer chess world champion, Shredder is also able to mimic the play of a human chess player with any playing strength.

Shredder Classic features an open protocol between the user interface and chess engine, allowing players to load up to ten chess engines simultaneously, and play against them.