Crafty – computer chess program

Crafty is a strong chess program. It is a chess engine, and concerns itself with playing chess and not with providing a graphical user interface. This means that Crafty is typically invoked indirectly by using a chess client.

Crafty uses all of the search algorithms you have probably read about and performs better than gnuchess in most positions. It has a good set of features to use, and offers a great starting point to try your own new search extensions.

Crafty is the son of Cray Blitz, also written by Bob Hyatt.

Features include:

  • Flexible and powerful command-line interface.
  • Uses the Chess Engine Communication Protocol.
  • Rotated bitboard data structures.
  • Supports multiple processors.
  • Negascout search.
  • Static exchange evaluation.
  • Alpha-beta pruning.
  • Transposition table.
  • Refutation table.
  • Evaluation cache.
  • Recursive null-move search.
  • Killer/history move ordering.
  • Quiescence move ordering and pruning.
  • Opening book.
  • Positional learning. Crafty learns from experience, and makes appropriate modifications to its opening book. The “book” command allows generation of an opening book (from PGN data), and customization of how it is used. The learning facilities synthesize several different approaches, and allow various ways for the user to customize and follow what is being learned.
  • Supports endgame tablebases; precompiled tablebases in the appropriate format are freely downloadable.
  • Polished facilities for internet play.
  • Annotation – generate PGN or HTML files.
  • Informative log files.

Website: www.craftychess.com
Support:
Developer: Robert Hyatt
License: Open source

Crafty

Crafty is written in C. Learn C with our recommended free books and free tutorials.

Return to Chess Home Page | Return to Games Home Page


Ongoing series
Linux for StartersNew to Linux? Read our Linux for Starters series.
Free and Open Source SoftwareThe largest compilation of the best free and open source software in the universe. Supplied with our legendary ratings charts.
Linux ReviewsHundreds of in-depth reviews offering our unbiased and expert opinion on software.
Alternatives to GoogleAlternatives to Google's Products and Services examines your options to migrate from the Google ecosystem with open source Linux alternatives.
MicrosoftAlternatives to Microsoft's Products and Services recommends open source Linux software.
Linux System ToolsEssential Linux system tools looks at small, indispensable utilities, useful for system administrators as well as regular users.
Linux ProductivityLinux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.
Home Computer EmulatorsHome computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.
Now and ThenNow and Then examines how promising open source software fared over the years.
Linux at HomeLinux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.
Linux CandyLinux Candy opens up to the lighter side of Linux. Have some fun!
Best Free Android AppsBest Free Android Apps. There's a strict eligibility criteria for inclusion in this series
Programming BooksThese best free books accelerate your learning of every programming language
Programming TutorialsThese free tutorials offer the perfect tonic to the free programming books series
Stars and StripesStars and Stripes is an occasional series looking at the impact of Linux in the USA
Share this article

Share your Thoughts

This site uses Akismet to reduce spam. Learn how your comment data is processed.