Zappa Mexico Ii Chess Engine

  • Zappa Mexico Ii Chess Engine May 4 2020 Just doesn't apply to Zappa Mexico II as, in reiteration, Zappa X (regardless of which Zappa X) served as an experimental engine before the final, finished product: Zappa Mexico II.
  • Mar 13, 2021 Engine Details. Show each game results. Zappa Mexico II 64-bit 4CPU #76‑77 (2967 +10 −10) Quote: Author: Anthony Cozzie (USA) Link: Homepage: This is.
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The top engines on the CEGT computer chess rating list at the time of writing are Rybka 3.0, Naum 4.0, Fritz 11, Zappa Mexico II, Thinker 5.4D, Shredder WM Edition Bonn, Hiarcs 12, Fruit 2.4 Beta A, Sjeng 3.0 and Glaurung 2.2. The previously extremely strong program Junior is now lagging behind on 16th. Stockfish is a powerful and open source chess engine. Stockfish is open source (GPLv3 license). That means you can read the code, modify it, and contribute back.

Zappa Mexico Ii Chess Engine 2

(Redirected from Zappa (Chess engine))
Developer(s)Anthony Cozzie, Zach Wegner (since 2010)
Initial releaseFebruary 2, 2005; 16 years ago
Stable release
Operating systemMicrosoft Windows, Linux
TypeChess engine

Zappa, Zap!Chess or Zappa Mexico, is a UCIchess engine written by Anthony Cozzie, a graduate student at the University of Illinois at Urbana-Champaign. The program emphasizes sound search and a good use of multiple processors. Earlier versions of Zappa are free (though not open-source software) and the current version (Zappa Mexico) is available at Shredder Computer Chess.[1]


Zappa scored an upset victory at the World Computer Chess Championship in August, 2005, in Reykjavík, Iceland where it won with a score of 1012 out of 11,[2][3][4] and beat both Junior and Shredder, programs that had won the championship many times.[5][6] In the speed chess portion of the tournament Zappa placed second, after Shredder.[7] Zappa's other tournament successes include winning CCT7 on the Internet Chess Club[8] (ICC) and defeating GrandmasterJaan Ehlvest 3-1.[9]

In Mexico in September 2007 Zappa won a match against Rybka by a score of 512 - 412.[10] Many commentators had predicted a slew of draws based on the strength of the engines, but the differences in style provided an interesting match with several decisive games and many fighting draws. Granite bookends. For some time, Zappa was considered one of the two strongest commercially available chess programs; see engine rating lists like CCRL[11] for current rankings. Some speculate that Zappa's more efficient SMP parallel search could make it stronger on enough processors.

In March 2008 Anthony Cozzie announced that 'the Zappa project is 100% finished', which includes both tournaments and future releases.[12]

In June 2010, Zach Wegner announced that he had acquired the rights to maintain and improve the Zappa engine. The improved engine competed in the 2010 WCCC under the name Rondo, achieving second place behind Rybka before the latter's disqualification.[13][14][15]


Immediately after the successful WCCC 2005, there were plans to commercialize Zappa, but the first attempts with Vincent Diepeveen failed.[16] In April 2006,[17] a commercial version dubbed Zap!Chess running under the Fritz GUI was released by ChessBase.[18]

The version of Zappa that won the Zappa-Rybka match, Zappa Mexico, is sold by Shredder Computer Chess,[1] is compatible with Windows and Linux computers with up to 512 CPU cores and supports multipv analysis and Nalimov tablebases.

Notable games[edit]

Here Zappa played Re1, threatening Qxa5 Rxa5 Rxe8#; the game continued 43.. Qf6 (if Rxe1 then Qg7#) 44. Rxe5 Qxe5 45. Ba2+ Kh8 46. Rd8 1–0.[19]

Zappa Mexico Ii Chess Engine Game

  • Zappa vs Crafty, WCCC 2005, 1-0 Despite Zappa being a relative newcomer, it managed to win the tournament and in general caused a bit of a stir in the computer chess community.[3]


Zappa Mexico Ii Chess Engine Youtube

  1. ^ ab'Zappa Mexico'. Retrieved 26 October 2013.
  2. ^'13th World Computer Chess Championship'. IGCA. Retrieved 26 October 2013.
  3. ^ abCozzie, Anthony. 'WCCC 2005 Photojournal'. Archived from the original on 22 March 2012. Retrieved 26 October 2013.
  4. ^'WCCC 2005 Reykjavik'. Archived from the original on 26 October 2013. Retrieved 26 October 2013.
  5. ^'Shredder'. IGCA. Retrieved 26 October 2013.
  6. ^'Junior'. IGCA. Retrieved 26 October 2013.
  7. ^'13th World Computer Chess Championship (Blitz)'. IGCA. Retrieved 26 October 2013.
  8. ^'CCT Results'. Retrieved 26 October 2013.
  9. ^'Report'. Retrieved 26 October 2013.
  10. ^Cozzie, Anthony. 'Match vs Rybka - Mexico 2007'. Retrieved 26 October 2013.
  11. ^CCRL engine ratings:
  12. ^'Anthony Cozzie'. Retrieved 2012-06-20.
  13. ^Rybka placed first but the program was found to have plagiarized Crafty and Fruit(the GPL'ed runner-up in 2005), and was stripped of its title. (Doggers, Peter. 'Rybka disqualified and banned from World Computer Chess Championships'. Chess Vibes. Archived from the original on March 30, 2014. Retrieved 29 June 2011.)
  14. ^'Zach, is this true?'. Retrieved 26 October 2013.
  15. ^'Zappa'. ICGA.
  16. ^Cozzie, Anthony. 'Re: Zappa Retail: No UCI?'. Retrieved 26 October 2013.
  17. ^'World Computer Chess Champion: Zap!Chess'. ChessBase. Retrieved 26 October 2013.
  18. ^'Zap!Chess'. ChessBase. Retrieved 26 October 2013.
  19. ^Cozzie, Anthony. 'Great moves'. Retrieved 27 October 2013.


  • 'Zappa official website at the Wayback Machine (archived September 18, 2012)'
  • Newborn, Monty (2011). Beyond Deep Blue: Chess in the Stratosphere. Springer. ISBN978-0-85729-341-1. Retrieved 26 October 2013.

Zappa Mexico Ii Chess Engines

External links[edit]

  • Official website
  • 13th World Computer Championship (WCCC2005) at the Wayback Machine (archived November 22, 2005)

Zappa Mexico Ii Download

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