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Zappa, Zap!Chess or Zappa Mexico, is a UCI chess 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.〔(【引用サイトリンク】url=http://www.shredderchess.com/chess-news/shredder-news/zappa-mexico-ii.html )〕 ==History== Zappa scored an upset victory at the World Computer Chess Championship in August, 2005, in Reykjavík, Iceland where it won with a score of 10½ out of 11,〔(【引用サイトリンク】url=http://www.grappa.univ-lille3.fr/icga/tournament.php?id=21 )〕 and beat both Junior and Shredder, programs that had won the championship many times.〔(【引用サイトリンク】url=http://www.grappa.univ-lille3.fr/icga/program.php?id=20 )〕〔(【引用サイトリンク】url=http://www.grappa.univ-lille3.fr/icga/program.php?id=24 )〕 In the speed chess portion of the tournament Zappa placed second, after Shredder.〔(【引用サイトリンク】url=http://www.grappa.univ-lille3.fr/icga/tournament.php?id=22 )〕 Zappa's other tournament successes include winning CCT7 on the Internet Chess Club〔(【引用サイトリンク】url=http://www.cctchess.com/previous-events/cct-7/cct-7-results/ )〕 (ICC) and defeating Grandmaster Jaan Ehlvest 3-1.〔(【引用サイトリンク】url=http://www.acoz.net/photos/zappa-ehlvest/ )〕 In Mexico in September 2007 Zappa won a match against Rybka by a score of 5½ - 4½. 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. For some time, Zappa was considered one of the two strongest commercially-available chess programs; see engine rating lists like CCRL〔CCRL engine ratings: http://computerchess.org.uk/ccrl/4040/〕 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. 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.〔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. ()〕〔(【引用サイトリンク】url=http://www.talkchess.com/forum/viewtopic.php?t=34749 )〕〔(【引用サイトリンク】url=http://www.grappa.univ-lille3.fr/icga/program.php?id=58 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Zappa (chess)」の詳細全文を読む スポンサード リンク
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