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Rybka requires Windows XP or later.
Engine enthusiasts and collectors can still purchase Rybka 4 without graphical user interface (GUI). If you have questions about the packages, you may ask at the Rybka forum.
The "Deep" version runs faster on machines with more than one core, on single core computers there is no difference in playing strength.
Rybka 4 from RybkaChess.com
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Important notes:
- If there are ordering problems or questions, please contact Share-It.
- For usage problems or questions, ask on the Rybka forum.
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Share-It adds an "extended download" option by default, costing an extra 6 Euro. We recommend to remove it (by unclicking it from the order form) and to create a backup on CD or any other media instead.
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