DanaSah

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**DanaSah**,
a [[Chess Engine Communication Protocol]], and since version **6.1** [[UCI]] compatible [[Open Source Engines|open source chess engine]] by [[Pedro Castro]], written in [[C]], and  first released in January 2005 <ref>[[http://wbec-ridderkerk.nl/html/details1/Danasah.html|DanaSah]] from [[WBEC|WBEC Ridderkerk]]</ref>. DanaSah's name is related to [[https://en.wikipedia.org/wiki/Dana|Dana]] of Daniela and [[https://ro.wikipedia.org/wiki/%C8%98ah_%28joc%29|Sah]], which means chess in [[https://en.wikipedia.org/wiki/Romanian_language|Romanian]] <ref>[[https://sites.google.com/site/danasah/english/readme|Chess Engine DanaSah | readme]]</ref>. Since DanaSah **6.1** in May 2016, [[Chess960|chess960]] is supported, available as [[Windows]], [[Linux]] and [[Android]] binary.

=Features=
<ref>[[https://sites.google.com/site/danasah/english/readme|Chess Engine DanaSah | readme]]</ref>
* [[Opening Book|Opening book]] of [[Pro Deo]]. Thanks to [[Ed Schroder|Ed Schröder]] and [[Jeroen Noomen]]
* [[Endgame Bitbases|Bitbases]] of [[Scorpio]]. Thanks to [[Daniel Shawul]]
* [[Board Representation|Board representation]]: [[Array|array]] of 64, based on [[FirstChess]] ([[Pham Hong Nguyen]])
* [[Aspiration Windows|Aspiration search]], window 15 and 150
* [[Principal Variation Search|PVS]] and [[Quiescence Search|quiescence search]]. Thanks to [[Bruce Moreland]] for his Web page
* [[Transposition Table|Transposition tables]]. Thanks to [[Miguel Izquierdo]] ([[Popochin]])
* [[Null Move Pruning#AdaptiveNullMovePruning|Adaptive Null move pruning]], [[Depth Reduction R|R]] = 2-5
* ([[Internal Iterative Deepening|Internal]]) [[Iterative Deepening]]
* [[Extensions|Search extensions]]: [[Check Extensions|check]], [[Passed Pawn Extensions|pawn on seventh]], [[Recapture Extensions|recapture]], transition to [[Pawn Endgame|pawn endgame]]
* [[Late Move Reductions|Late move reductions]]
* [[Razoring]]
* [[Move Ordering|Move ordering]]: [[Hash Move|hash move]], [[PV-Move]], [[Captures|captures]], [[Promotions|promotions]], [[Killer Move|killer moves]], [[History Heuristic|history heuristic]]
* [[Evaluation]] with [[Lazy Evaluation|lazy eval]] and [[Evaluation Hash Table|evaluation cache]], [[Material]], [[Piece-Square Tables|piece-square tables]], [[Pawn Structure|pawn structure]], [[Open file|open files]], [[Mobility|mobility]], [[King Safety|king safety]]

=Tournament Play=
DanaSah played on-line the [[CCT9]], [[CCT10]] and [[CCT12]] [[CCT Tournaments]], and the [[WCRCC 2007]], the First Annual ACCA World Computer Rapid Chess Championship. Over the board, DanaSah played the [[WCCC 2009]] blitz tournament in [[https://en.wikipedia.org/wiki/Pamplona|Pamplona]], [[https://en.wikipedia.org/wiki/Spain|Spain]] <ref>[[http://www.game-ai-forum.org/icga-tournaments/tournament.php?id=208|7th World Computer Chess Championship (Blitz) - Pamplona 2009 (ICGA Tournaments)]]</ref>, and won the [[CCC 2009|4th Chess Computer Cup]] in [[https://en.wikipedia.org/wiki/Carugate|Carugate]], [[https://en.wikipedia.org/wiki/Italy|Italy]]  the same year, and further played the [[IOCSC 2010]] and [[IOCSC 2012]] [[Italian Computer Chess Championship#IOCSC|Italian Open Chess Software Cups]], the latter in the original category.

=Photos & Games=
|| [[image:DanaSah.JPG link="http://www.scaccomasco.com/foto/2009/CCC4-7_nov/album/index.html"]] ||
||  [[CCC 2009]], round 1, [[BremboCE]] vs [[DanaSah]] operated by Sonia  <ref>[[http://www.scaccomasco.com/foto/2009/CCC4-7_nov/album/index.html|Chess Computer Cup 4 - Photo Gallerie 1]]</ref>  <ref>[[http://www.scaccomasco.com/2009/wwwCCC4/tblscore.html|Chess Computer Cup 4]]</ref> ||
[[code]]
[Event "Computer Chess Cup 4"]
[Site "Carugate"]
[Date "2009.11.07"]
[Round "1"]
[White "BremboCE 0.6.2"]
[Black "DanaSah v.4.24"]
[Result "0-1"]

1.c4 b6 2.Nc3 Bb7 3.e4 e6 4.d4 Bb4 5.Qc2 Qh4 6.Bd3 f5 7.g3 Qh5 8.Bd2 Nf6 
9.f3 Nc6 10.Nb5 fxe4 11.fxe4 O-O 12.Ne2 a6 13.Nbc3 Bd6 14.O-O Ng4 15.h4 
Nb4 16.Rxf8+ Rxf8 17.Qb3 Bxg3 18.Rf1 Rxf1+ 19.Kxf1 Nh2+ 20.Kg1 Qf3 21.Nxg3 
Qxg3+ 22.Kh1 Nf3 23.Qxb4 Qh2#  0-1
[[code]]

=See also=
* [[Caligula PC|Caligula]]

=Forum Posts=
==2005 ...==
* [[http://www.stmintz.com/ccc/index.php?id=435719|DanaSah 1.0 - GM Mario Gómez (1-2)]] by [[Pedro Castro]], [[CCC]], July 08, 2005
* [[http://www.stmintz.com/ccc/index.php?id=436603|DanaSah 1.6 vs Pablo Ignacio Restrepo (Father)]] by [[Pedro Castro]], [[CCC]], July 13, 2005
* [[http://www.open-aurec.com/wbforum/viewtopic.php?p=32935|danasah for linux]] by [[Pedro Castro]], [[Computer Chess Forums|Winboard Forum]], March 18, 2008 » [[Linux]]
* [[http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=49240|Update DanaSah and Caligula]] by [[Pedro Castro]], [[Computer Chess Forums|Winboard Forum]], June 04, 2008 » [[Caligula PC|Caligula]]
==2010 ...==
* [[http://www.talkchess.com/forum/viewtopic.php?t=33335|DanaSah 4.37]] by [[Graham Banks]], [[CCC]], March 18, 2010
* [[http://www.talkchess.com/forum/viewtopic.php?t=34515|STS [1-10] Danasah 4.45]] by [[Swaminathan Natarajan|Swaminathan]], [[CCC]], May 26, 2010 » [[Strategic Test Suite]]
* [[http://www.talkchess.com/forum/viewtopic.php?t=46742|DanaSah 5.00]] by [[http://www.talkchess.com/forum/profile.php?mode=viewprofile&u=881|Ruxy Sylwyka]], [[CCC]], January 03, 2013
* [[http://www.talkchess.com/forum/viewtopic.php?t=48354|DanaSah and DanaSah-Z]] by [[Pedro Castro]], [[CCC]], June 20, 2013
* [[http://www.talkchess.com/forum/viewtopic.php?t=48530|Test DanaSah 5.06]] by [[Pedro Castro]], [[CCC]], July 03, 2013
==2015 ...==
* [[http://www.talkchess.com/forum/viewtopic.php?t=59905|Chess on Android]] by [[Pedro Castro]], [[CCC]], April 19, 2016 » [[Chess for Android]], [[Chess Engine Communication Protocol]]
* [[http://www.talkchess.com/forum/viewtopic.php?t=60278|DanaSah 6.1 for Windows and Android]] by [[Pedro Castro]], [[CCC]], May 25, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=63185|DanaSah 6.5]] by [[Pedro Castro]], [[CCC]], February 15, 2017
* [[http://www.talkchess.com/forum/viewtopic.php?t=65406|Danasah 7.0]] by [[Sergio Martinez]], [[CCC]], October 09, 2017

=External Links=
==Chess Engine==
* [[https://sites.google.com/site/danasah/english/home|Chess Engine DanaSah]]
* [[http://www.game-ai-forum.org/icga-tournaments/program.php?id=606|Danasah's ICGA Tournaments]]
* [[https://sites.google.com/site/hispanicchessengines/hispanic-american-engines-1/description|Descriptions - Hispanic Chess Engines]]
* [[http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=DanaSah&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Comopp+gamenum+table&print=Overlap+table&print=Score+with+common+opponents|DanaSah]] in [[CCRL|CCRL 40/40]]
* [[http://www.computerchess.org.uk/ccrl/404FRC/cgi/compare_engines.cgi?family=DanaSah&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Score+with+common+opponents&match_length=30|DanaSah]] in [[CCRL|CCRL 40/4 FRC]]
==Misc==
* [[https://en.wikipedia.org/wiki/Dana|Dana from Wikipedia]]
* [[https://en.wiktionary.org/wiki/Dana|Dana - Wiktionary]]
* [[https://en.wiktionary.org/wiki/sah|sah - Wiktionary]]

=References= 
<references />
=What links here?= 
[[include page="DanaSah" component="backlinks" limit="40"]]
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