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Loop (Program)

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=64-bit Loop=
The [[Bitboards|bitboard]] based Loop applies [[Magic Bitboards]] for [[Sliding Piece Attacks|sliding piece attack generation]]. Further, iterative [[Alpha-Beta|alpha-beta]] bounded [[Static Exchange Evaluation|static exchange evaluation]] was applied to ''Loop Amsterdam'' <ref>[[Fritz Reul]] ('''2010'''). ''Static Exchange Evaluation with αβ-Approach''. [[ICGA Journal#33_1|ICGA Journal, Vol. 33, No. 1]]</ref> , also performing a [[Parallel Search|parallel search]] for a quad-core processor, which played a strong [[WCCC 2007]] in [https://en.wikipedia.org/wiki/Amsterdam Amsterdam], and became Third, behind the later disqualified [[Rybka]], and [[Zappa]] <ref>[https://www.game-ai-forum.org/icga-tournaments/tournament.php?id=173 15th World Computer Chess Championship - Amsterdam 2007 (ICGA Tournaments)]</ref> .
Fritz Reul on an essential reason of Loop's success in Amsterdam in his thesis <ref>[[Fritz Reul]] ('''2009'''). ''New Architectures in Computer Chess'', Ph.D. thesis, 5.1.2 Magic Hash Functions for Bitboards, pp. 97</ref> :
==Fruit Evaluation Overlap==
During the [[ICGA Investigations]] concerning the [[Rybka Controversy]] and [[Evaluation Overlap|evaluation overlaps]], 64-bit Loop was inspected by [[Mark Watkins]] who found congruence with the evaluation of [[Fruit|Fruit 2.1]] <ref>[http://www.open-chess.org/viewtopic.php?f=5&t=1353 Loop 2007 / Fruit 2.1] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], April 18, 2011</ref> . As confirmed by [[David Levy]] <ref> [httphttps://wwwen.chessbase.com/newsdetail.asp?newsid=7926 post/icga-rybka-controversy-feedback ICGA/Rybka controversy: Feedback - Allegations against another Chess Engine – The LOOP Program] by [[David Levy]], [[ChessBase|ChessBase News]], February 17, 2012</ref>, the [[ICGA]] has received a complaint on Loop by Fruit author [[Fabien Letouzey]] and an investigation has been started about this case, as already mentioned by Watkins in August 2011 <ref>[http://www.open-chess.org/viewtopic.php?f=5&t=1353#p13794 Re: Loop 2007 / Fruit 2.1] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], August 22, 2011</ref> .
<span id="Complaints"></span>
=Complaints=
[[ICGA]] President [[David Levy]], May 09, 2014 <ref>[https://icga.leidenuniv.nlorg/?p=919 Complaints against the Chess programs LOOP and THINKER] by [[David Levy]], [[ICGA]] President, May 9, 2014</ref>
The ICGA has received formal complaints against the Chess programs LOOP and [[Thinker|THINKER]], both of which have participated in the World Computer Chess Championship. LOOP was entered by Fritz Reul into the [[WCCC 2007|2007 WCCC]] in Amsterdam. THINKER was entered into the [[WCCC 2010|2010 WCCC]] in Kanazawa.
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=External Links=
==Chess Engine==
* [https://www.loopchess.com/ Loop Computer Chess]
* [https://www.game-ai-forum.org/icga-tournaments/program.php?id=123 List's ICGA Tournaments] (covers Loop)
* [http://www.computer-chess.org/doku.php?id=computer_chess:wiki:download:engine_download_list Engine Download List] from [[Ron Murawski|Ron Murawski's]] [http://computer-chess.org/doku.php?id=home Computer-Chess Wiki]
* [https://en.wikipedia.org/wiki/Wii_Chess Wii Chess from Wikipedia]
* [https://en.chessbase.com/post/icga-rybka-controversy-feedback ICGA/Rybka controversy: Feedback - Allegations against another Chess Engine – The LOOP Program] by [[David Levy]], [[ChessBase|ChessBase News]], February 17, 2012
* [https://icga.leidenuniv.nlorg/?p=354 Allegations against two more Chess Engines – The LOOP Program] by [[David Levy]], [[ICGA]] president, May 22, 2012 » [[Thinker]]* [https://icga.leidenuniv.nlorg/?p=919 Complaints against the Chess programs LOOP and THINKER] by [[David Levy]], [[ICGA]] President, May 9, 2014
==Misc==
* [https://en.wikipedia.org/wiki/Loop Loop disambiguation page from Wikipedia]
: [https://en.wikipedia.org/wiki/Do_while_loop Do while loop]
: [https://en.wikipedia.org/wiki/Infinite_loop Infinite loop]
* [https://en.wikipedia.org/wiki/Dirty_Loops Dirty Loops] - Songs for Lovers - Coffee Break is over, Guitar cover with [[https://en.wikipedia.org/wiki/Rolling_in_the_Deep Rolling in the DeepCategory:Sandeep Mohan|Sandeep Mohan] ([https://en.wikipedia.org/wiki/Adele Adele] Cover), [https://en.wikipedia.org/wiki/YouTube YouTube] Video: {{#evu:https://www.youtube.com/watch?v=nsqh9jHkHlMqHLUa8mWtUo|alignment=left|valignment=top}}
=References=
'''[[Engines|Up one level]]'''
[[Category:UCI]]
[[Category:Chess960]]
[[Category:Commercial]]
[[Category:Industrial Heritage Trail]]
[[Category:MusicSandeep Mohan]]

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