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Gull
,Created page with "'''Home * Engines * Gull''' FILE:ScheveningenGulls.JPG|border|right|thumb|Scheveningen Gulls <ref>Gulls at the beach of [https://en.wikipedia.org/wiki/Sc..."
'''[[Main Page|Home]] * [[Engines]] * Gull'''
[[FILE:ScheveningenGulls.JPG|border|right|thumb|Scheveningen Gulls <ref>Gulls at the beach of [https://en.wikipedia.org/wiki/Scheveningen Scheveningen] [https://en.wikipedia.org/wiki/Kurhaus_of_Scheveningen Kurhaus], Photo by [[Gerd Isenberg]], December 26, 2015</ref> ]]
'''Gull''', (GullChess)<br/>
an [[UCI]] compliant [[:Category:Open Source|open source engine]] in the [https://en.wikipedia.org/wiki/Public_domain public domain] by [[Vadim Demichev]] <ref>[https://en.wikipedia.org/wiki/Chess_engine Chess engine from Wikiepdia]</ref>, inspired by ideas and code from other open source engines, notably from [[Ivanhoe]] of the [[Ippolit]] family of programs, and from [[Strelka]], whose authors are suspected of [https://en.wikipedia.org/wiki/Reverse_engineering reverse engineering] [[Rybka]], to examine and use her ideas. [[Ron Murawski|Ron Murawski's]] Computer-Chess Wiki mentions GullChess as Ivanhoe derivative <ref>[http://computer-chess.org/doku.php?id=computer_chess:wiki:lists:chess_engine_list Chess Engine List] from [[Ron Murawski|Ron Murawski's]] [http://computer-chess.org/doku.php?id=home Computer-Chess Wiki]</ref>. The further socialization of concrete implementations with disputed origin in the public domain, as already started with Ippolit, remains a highly controversial topic.
=Description=
Gull applies [[Magic Bitboards|magic bitboards]] to determine [[Sliding Piece Attacks|sliding piece attacks]], a [[Material Tables|material table]] indexing scheme with disjoint light and dark bishops, [[Principal Variation Search|PVS]] with [[Aspiration Windows|aspiration windows]], and a [[Parallel Search|parallel search]] based on [[Process|processes]]. Version 1.2 is written in compact and neat [[Cpp|C++]] code and consists of only one single source file. It features [[Generic Programming|generic]] function templates in [[Recursion|recursive]] search routines as well in various functions called by search, i.e. for [[Move Generation|move generation]], with [[Side to move|side to move]] and [[Hash Move|hash-move]] exclusion for [[Singular Extensions|singular extensions]] as boolean template parameters, delegating conditions on these to compile-time.
=Releases & Forks=
==Gull 2.1==
Gull '''2.1''', released in June 2013, has [[Evaluation|evaluation]] weights optimized with the use of [[Automated Tuning|automated tuning]] (source code included). Gull's 2.1 evaluation is no longer almost identical to that of Ivanhoe. Further, it features some minor search, [[Time Management|time management]] and [[Parallel Search|SMP]] efficiency enhancements <ref>[http://www.open-chess.org/viewtopic.php?f=7&t=109&start=120#p18910 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], June 17, 2013 (Gull 2.1)</ref>.
<span id="Gull2.8"></span>
==Gull 2.8 beta==
Gull '''2.8 beta''', released in January 2014 and competing [[TCEC Season 6]], comes with minor search tweaks but a full evaluation rewrite, being back an original engine <ref>Gull 2.8 beta.zip/Gull 2.8 beta/readme.txt</ref>. A [[BMI2]] build provides a small speedup on [https://en.wikipedia.org/wiki/Haswell_%28microarchitecture%29 Haswell architecture] due to the replacement of [[Magic Bitboards|magic bitboards]] by [[BMI2#PEXTBitboards|PEXT bitboards]].
<span id="Gull3"></span>
==Gull 3==
Gull '''3''', released April 17, 2014, with further [[Automated Tuning|optimization]] of evaluation weights and a rewritten [[Parallel Search|SMP search]], features nonlinear [[King Safety#PawnShield|king shelter evaluation]] and more [[Endgame|endgame knowledge]]. [[Basil Falcinelli]] implemented a [[Linux]] port <ref>[http://www.talkchess.com/forum/viewtopic.php?t=58071 Gull 3 (Linux port) released] by [[Basil Falcinelli]], [[CCC]], October 28, 2015</ref> and [[Syzygy Bases]] support, introducing [[Syzygy Bases#Fathom|Fathom]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=58299 Gull 3 Linux+Syzygy and Fathom released] by [[Basil Falcinelli]], [[CCC]], November 20, 2015</ref>, while [[Michael Byrne]] worked on a [[Mac OS]] port <ref>[http://www.talkchess.com/forum/viewtopic.php?t=58096 Gull 3 x64 Mac Results] by [[Michael Byrne|Michael B]], [[CCC]], October 30, 2015</ref> dubbed <span id="Hawkeye"></span>'''Hawkeye''' <ref>[http://www.talkchess.com/forum/viewtopic.php?t=60695 Hawkeye 1.01] by [[Michael Byrne|Michael B]], [[CCC]], July 05, 2016</ref>, [[Tom Hyer]] introduced his Gull 3 derivative <span id="Roc"></span>'''Roc''' <ref>[https://github.com/TomHyer/Roc GitHub - TomHyer/Roc: C++ chess engine derived from Gull 3]</ref>, and [[Norman Schmidt]] <span id="SeaGull"></span>'''SeaGull''' also based on Gull 3 <ref>[https://github.com/FireFather/seagull GitHub - FireFather/seagull: chess engine based on Gull 3] by [[Norman Schmidt]]</ref>.
<span id="LazyGull"></span>
==LazyGull==
'''LazyGull''' is a free UCI chess engine under the [[Massachusetts Institute of Technology#License|MIT License]] derived from Gull 3 by [[Basil Falcinelli]] <ref>[https://github.com/basil00/Gull GitHub - basil00/Gull: Gull chess (Linux/Mac port) - The LazyGull Chess Engine]</ref>. LazyGull features [[Syzygy Bases]] support via [[Syzygy Bases#Fathom|Fathom]], [[Lazy SMP]], and [[BMI2#PDEPBitboards|PDEP bitboards]] for modern [[x86-64]] CPUs, and is portable to [[Windows]], [[Linux]] and [[Mac OS|MacOSX]] <ref>[https://github.com/basil00/Gull/blob/master/README.md Gull/README.md at master · basil00/Gull · GitHub]</ref>.
=See also=
* [[:Category:Bird|Bird]]
=Forum Posts=
==2010 ...==
* [http://immortalchess.net/forum/showthread.php?t=2354 Проект "Чайка"] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|immortalchess]], June 07, 2010, [http://translate.google.com/translate?sl=ru&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fimmortalchess.net%2Fforum%2Findex.php translated] by [https://en.wikipedia.org/wiki/Google_Translate Google Translate]
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=51022 GullChess] by [[Olivier Deville]], [[Computer Chess Forums|Winboard Forum]], June 09, 2010
* [http://www.open-chess.org/viewtopic.php?f=7&t=109 gull chess] by Karger, [[Computer Chess Forums|OpenChess Forum]], June 12, 2010
: [http://www.open-chess.org/viewtopic.php?f=7&t=109&p=724#p724 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], June 13, 2010 » [[Gaviota]]
: [http://www.open-chess.org/viewtopic.php?f=7&t=109&start=120#p18910 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], June 17, 2013 (Gull 2.1)
: [http://www.open-chess.org/viewtopic.php?f=7&t=109&start=150#p20221 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], January 26, 2014 (Gull 2.8 beta & Gull 2.9 alpha)
* [http://www.talkchess.com/forum/viewtopic.php?t=48325 GullChess 2.1] by [[Norbert Raimund Leisner]], [[CCC]], June 18, 2013
* [http://www.open-chess.org/viewtopic.php?f=5&t=2378 DTS-like SMP] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], July 25, 2013 » [[Parallel Search]]
* [http://immortalchess.net/forum/showpost.php?p=464718&postcount=326 Re: Gull] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|immortalchess]], February 10, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=58071 Gull 3 (Linux port) released] by [[Basil Falcinelli]], [[CCC]], October 28, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58096 Gull 3 x64 Mac Results] by [[Michael Byrne|Michael B]], [[CCC]], October 30, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58299 Gull 3 Linux+Syzygy and Fathom released] by [[Basil Falcinelli]], [[CCC]], November 20, 2015 » [[Syzygy Bases#Fathom|Fathom]]
'''2016'''
* [http://www.talkchess.com/forum/viewtopic.php?t=59002 Gull 3.0.1 available, takes advantage of hyperthreading] by [[Dmitri Gusev]], [[CCC]], January 21, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60217 Gull 3.0 Syzygy in GitHub] by [[Jose Mº Velasco]], [[CCC]], May 19, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60663 Gull 3 x64] by [[Michael Byrne|Michael B]], [[CCC]], July 01, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60695 Hawkeye 1.01] by [[Michael Byrne|Michael B]], [[CCC]], July 05, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60725 Hawkeye 1.01 Released] by [[Michael Byrne|Michael B]], [[CCC]], July 07, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60772 Hawkeye is now on Github] by [[Michael Byrne|Michael B]], [[CCC]], July 10, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60776 Hawkeye 1.02 Released] by [[Michael Byrne|Michael B]], [[CCC]], July 11, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60831 HAwkeye 1.03 Released] by [[Michael Byrne|Michael B]], [[CCC]], July 16, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=61195 Future of Gull] by [[Tom Hyer]], [[CCC]], August 23, 2016 <ref>[https://bitbucket.org/hyer/sonsofthebird/src/052b62b0c78d11889379d5909bbe617b70274076/Slizzard/?at=default hyer / SonsOfTheBird / source / Slizzard — Bitbucket]</ref>
'''2017'''
* [http://www.talkchess.com/forum/viewtopic.php?t=62856 New engine "Roc"] by [[Tom Hyer]], [[CCC]], January 18, 2017
* [http://www.talkchess.com/forum/viewtopic.php?t=64418 Open-source improvements released] by [[Norman Schmidt]], [[CCC]], June 26, 2017
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=65727 question: Gull 3 syzygy] by kasinp, [[CCC]], November 14, 201
=External Links=
==Source Code Repositories==
* [http://gullchess.sourceforge.net/ SourceForge.net: GullChess - Project Web Hosting - Open Source Software] by [[Vadim Demichev|ThinkingALot]]
* [http://sourceforge.net/projects/gullchess/ GullChess | Free software downloads at SourceForge.net]
* [https://bitbucket.org/hyer/sonsofthebird/src/052b62b0c78d11889379d5909bbe617b70274076/Slizzard/?at=default hyer / SonsOfTheBird / source / Slizzard — Bitbucket] by [[Tom Hyer]] <ref> [http://www.talkchess.com/forum/viewtopic.php?t=61195 Future of Gull] by [[Tom Hyer]], [[CCC]], August 23, 2016</ref>
* [https://github.com/Velmarin/Chess-Gull-Syzygy GitHub - Velmarin/Chess-Gull-Syzygy: Chess uci engine with support Syzygy tablebassses] by [[Jose Mº Velasco]]
* [https://github.com/MichaelB7/Hawkeye GitHub - MichaelB7/Hawkeye: UCI Chess Engine based on Gull] by [[Michael Byrne]]
* [https://github.com/TomHyer/Roc GitHub - TomHyer/Roc: C++ chess engine derived from Gull 3] by [[Tom Hyer]]
* [https://github.com/basil00/Gull GitHub - basil00/Gull: Gull chess (Linux/Mac port) - The LazyGull Chess Engine] by [[Basil Falcinelli]]
* [https://github.com/FireFather/seagull GitHub - FireFather/seagull: chess engine based on Gull 3] by [[Norman Schmidt]]
==Rating==
* [http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?print=Details&each_game=1&eng=Gull%201.2%2064-bit#Gull_1_2_64-bit Gull 1.2 64-bit] in [[CCRL|CCRL 40/40]]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?match_length=30&each_game=1&print=Details&each_game=1&eng=Gull%203%2064-bit%204CPU#Gull_3_64-bit_4CPU Gull 3 64-bit 4CPU] in [[CCRL|CCRL 40/40]]
==Misc==
* [https://en.wikipedia.org/wiki/Gull Gull (Seagull) from Wikipedia]
* [https://en.wikipedia.org/wiki/The_Birds_%28story%29 The Birds (story) from Wikipedia]
* [https://en.wikipedia.org/wiki/The_Birds_%28film%29 The Birds (film) from Wikipedia]
* [https://en.wikipedia.org/wiki/Frode_Aln%C3%A6s Frode Alnæs] - Gull av hav, Kanestrøm 2016, [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=rsBm3jzMHUo|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:UCI]]
[[FILE:ScheveningenGulls.JPG|border|right|thumb|Scheveningen Gulls <ref>Gulls at the beach of [https://en.wikipedia.org/wiki/Scheveningen Scheveningen] [https://en.wikipedia.org/wiki/Kurhaus_of_Scheveningen Kurhaus], Photo by [[Gerd Isenberg]], December 26, 2015</ref> ]]
'''Gull''', (GullChess)<br/>
an [[UCI]] compliant [[:Category:Open Source|open source engine]] in the [https://en.wikipedia.org/wiki/Public_domain public domain] by [[Vadim Demichev]] <ref>[https://en.wikipedia.org/wiki/Chess_engine Chess engine from Wikiepdia]</ref>, inspired by ideas and code from other open source engines, notably from [[Ivanhoe]] of the [[Ippolit]] family of programs, and from [[Strelka]], whose authors are suspected of [https://en.wikipedia.org/wiki/Reverse_engineering reverse engineering] [[Rybka]], to examine and use her ideas. [[Ron Murawski|Ron Murawski's]] Computer-Chess Wiki mentions GullChess as Ivanhoe derivative <ref>[http://computer-chess.org/doku.php?id=computer_chess:wiki:lists:chess_engine_list Chess Engine List] from [[Ron Murawski|Ron Murawski's]] [http://computer-chess.org/doku.php?id=home Computer-Chess Wiki]</ref>. The further socialization of concrete implementations with disputed origin in the public domain, as already started with Ippolit, remains a highly controversial topic.
=Description=
Gull applies [[Magic Bitboards|magic bitboards]] to determine [[Sliding Piece Attacks|sliding piece attacks]], a [[Material Tables|material table]] indexing scheme with disjoint light and dark bishops, [[Principal Variation Search|PVS]] with [[Aspiration Windows|aspiration windows]], and a [[Parallel Search|parallel search]] based on [[Process|processes]]. Version 1.2 is written in compact and neat [[Cpp|C++]] code and consists of only one single source file. It features [[Generic Programming|generic]] function templates in [[Recursion|recursive]] search routines as well in various functions called by search, i.e. for [[Move Generation|move generation]], with [[Side to move|side to move]] and [[Hash Move|hash-move]] exclusion for [[Singular Extensions|singular extensions]] as boolean template parameters, delegating conditions on these to compile-time.
=Releases & Forks=
==Gull 2.1==
Gull '''2.1''', released in June 2013, has [[Evaluation|evaluation]] weights optimized with the use of [[Automated Tuning|automated tuning]] (source code included). Gull's 2.1 evaluation is no longer almost identical to that of Ivanhoe. Further, it features some minor search, [[Time Management|time management]] and [[Parallel Search|SMP]] efficiency enhancements <ref>[http://www.open-chess.org/viewtopic.php?f=7&t=109&start=120#p18910 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], June 17, 2013 (Gull 2.1)</ref>.
<span id="Gull2.8"></span>
==Gull 2.8 beta==
Gull '''2.8 beta''', released in January 2014 and competing [[TCEC Season 6]], comes with minor search tweaks but a full evaluation rewrite, being back an original engine <ref>Gull 2.8 beta.zip/Gull 2.8 beta/readme.txt</ref>. A [[BMI2]] build provides a small speedup on [https://en.wikipedia.org/wiki/Haswell_%28microarchitecture%29 Haswell architecture] due to the replacement of [[Magic Bitboards|magic bitboards]] by [[BMI2#PEXTBitboards|PEXT bitboards]].
<span id="Gull3"></span>
==Gull 3==
Gull '''3''', released April 17, 2014, with further [[Automated Tuning|optimization]] of evaluation weights and a rewritten [[Parallel Search|SMP search]], features nonlinear [[King Safety#PawnShield|king shelter evaluation]] and more [[Endgame|endgame knowledge]]. [[Basil Falcinelli]] implemented a [[Linux]] port <ref>[http://www.talkchess.com/forum/viewtopic.php?t=58071 Gull 3 (Linux port) released] by [[Basil Falcinelli]], [[CCC]], October 28, 2015</ref> and [[Syzygy Bases]] support, introducing [[Syzygy Bases#Fathom|Fathom]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=58299 Gull 3 Linux+Syzygy and Fathom released] by [[Basil Falcinelli]], [[CCC]], November 20, 2015</ref>, while [[Michael Byrne]] worked on a [[Mac OS]] port <ref>[http://www.talkchess.com/forum/viewtopic.php?t=58096 Gull 3 x64 Mac Results] by [[Michael Byrne|Michael B]], [[CCC]], October 30, 2015</ref> dubbed <span id="Hawkeye"></span>'''Hawkeye''' <ref>[http://www.talkchess.com/forum/viewtopic.php?t=60695 Hawkeye 1.01] by [[Michael Byrne|Michael B]], [[CCC]], July 05, 2016</ref>, [[Tom Hyer]] introduced his Gull 3 derivative <span id="Roc"></span>'''Roc''' <ref>[https://github.com/TomHyer/Roc GitHub - TomHyer/Roc: C++ chess engine derived from Gull 3]</ref>, and [[Norman Schmidt]] <span id="SeaGull"></span>'''SeaGull''' also based on Gull 3 <ref>[https://github.com/FireFather/seagull GitHub - FireFather/seagull: chess engine based on Gull 3] by [[Norman Schmidt]]</ref>.
<span id="LazyGull"></span>
==LazyGull==
'''LazyGull''' is a free UCI chess engine under the [[Massachusetts Institute of Technology#License|MIT License]] derived from Gull 3 by [[Basil Falcinelli]] <ref>[https://github.com/basil00/Gull GitHub - basil00/Gull: Gull chess (Linux/Mac port) - The LazyGull Chess Engine]</ref>. LazyGull features [[Syzygy Bases]] support via [[Syzygy Bases#Fathom|Fathom]], [[Lazy SMP]], and [[BMI2#PDEPBitboards|PDEP bitboards]] for modern [[x86-64]] CPUs, and is portable to [[Windows]], [[Linux]] and [[Mac OS|MacOSX]] <ref>[https://github.com/basil00/Gull/blob/master/README.md Gull/README.md at master · basil00/Gull · GitHub]</ref>.
=See also=
* [[:Category:Bird|Bird]]
=Forum Posts=
==2010 ...==
* [http://immortalchess.net/forum/showthread.php?t=2354 Проект "Чайка"] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|immortalchess]], June 07, 2010, [http://translate.google.com/translate?sl=ru&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fimmortalchess.net%2Fforum%2Findex.php translated] by [https://en.wikipedia.org/wiki/Google_Translate Google Translate]
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=51022 GullChess] by [[Olivier Deville]], [[Computer Chess Forums|Winboard Forum]], June 09, 2010
* [http://www.open-chess.org/viewtopic.php?f=7&t=109 gull chess] by Karger, [[Computer Chess Forums|OpenChess Forum]], June 12, 2010
: [http://www.open-chess.org/viewtopic.php?f=7&t=109&p=724#p724 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], June 13, 2010 » [[Gaviota]]
: [http://www.open-chess.org/viewtopic.php?f=7&t=109&start=120#p18910 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], June 17, 2013 (Gull 2.1)
: [http://www.open-chess.org/viewtopic.php?f=7&t=109&start=150#p20221 Re: gull chess] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], January 26, 2014 (Gull 2.8 beta & Gull 2.9 alpha)
* [http://www.talkchess.com/forum/viewtopic.php?t=48325 GullChess 2.1] by [[Norbert Raimund Leisner]], [[CCC]], June 18, 2013
* [http://www.open-chess.org/viewtopic.php?f=5&t=2378 DTS-like SMP] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|OpenChess Forum]], July 25, 2013 » [[Parallel Search]]
* [http://immortalchess.net/forum/showpost.php?p=464718&postcount=326 Re: Gull] by [[Vadim Demichev|ThinkingALot]], [[Computer Chess Forums|immortalchess]], February 10, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=58071 Gull 3 (Linux port) released] by [[Basil Falcinelli]], [[CCC]], October 28, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58096 Gull 3 x64 Mac Results] by [[Michael Byrne|Michael B]], [[CCC]], October 30, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58299 Gull 3 Linux+Syzygy and Fathom released] by [[Basil Falcinelli]], [[CCC]], November 20, 2015 » [[Syzygy Bases#Fathom|Fathom]]
'''2016'''
* [http://www.talkchess.com/forum/viewtopic.php?t=59002 Gull 3.0.1 available, takes advantage of hyperthreading] by [[Dmitri Gusev]], [[CCC]], January 21, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60217 Gull 3.0 Syzygy in GitHub] by [[Jose Mº Velasco]], [[CCC]], May 19, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60663 Gull 3 x64] by [[Michael Byrne|Michael B]], [[CCC]], July 01, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60695 Hawkeye 1.01] by [[Michael Byrne|Michael B]], [[CCC]], July 05, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60725 Hawkeye 1.01 Released] by [[Michael Byrne|Michael B]], [[CCC]], July 07, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60772 Hawkeye is now on Github] by [[Michael Byrne|Michael B]], [[CCC]], July 10, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60776 Hawkeye 1.02 Released] by [[Michael Byrne|Michael B]], [[CCC]], July 11, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60831 HAwkeye 1.03 Released] by [[Michael Byrne|Michael B]], [[CCC]], July 16, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=61195 Future of Gull] by [[Tom Hyer]], [[CCC]], August 23, 2016 <ref>[https://bitbucket.org/hyer/sonsofthebird/src/052b62b0c78d11889379d5909bbe617b70274076/Slizzard/?at=default hyer / SonsOfTheBird / source / Slizzard — Bitbucket]</ref>
'''2017'''
* [http://www.talkchess.com/forum/viewtopic.php?t=62856 New engine "Roc"] by [[Tom Hyer]], [[CCC]], January 18, 2017
* [http://www.talkchess.com/forum/viewtopic.php?t=64418 Open-source improvements released] by [[Norman Schmidt]], [[CCC]], June 26, 2017
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=65727 question: Gull 3 syzygy] by kasinp, [[CCC]], November 14, 201
=External Links=
==Source Code Repositories==
* [http://gullchess.sourceforge.net/ SourceForge.net: GullChess - Project Web Hosting - Open Source Software] by [[Vadim Demichev|ThinkingALot]]
* [http://sourceforge.net/projects/gullchess/ GullChess | Free software downloads at SourceForge.net]
* [https://bitbucket.org/hyer/sonsofthebird/src/052b62b0c78d11889379d5909bbe617b70274076/Slizzard/?at=default hyer / SonsOfTheBird / source / Slizzard — Bitbucket] by [[Tom Hyer]] <ref> [http://www.talkchess.com/forum/viewtopic.php?t=61195 Future of Gull] by [[Tom Hyer]], [[CCC]], August 23, 2016</ref>
* [https://github.com/Velmarin/Chess-Gull-Syzygy GitHub - Velmarin/Chess-Gull-Syzygy: Chess uci engine with support Syzygy tablebassses] by [[Jose Mº Velasco]]
* [https://github.com/MichaelB7/Hawkeye GitHub - MichaelB7/Hawkeye: UCI Chess Engine based on Gull] by [[Michael Byrne]]
* [https://github.com/TomHyer/Roc GitHub - TomHyer/Roc: C++ chess engine derived from Gull 3] by [[Tom Hyer]]
* [https://github.com/basil00/Gull GitHub - basil00/Gull: Gull chess (Linux/Mac port) - The LazyGull Chess Engine] by [[Basil Falcinelli]]
* [https://github.com/FireFather/seagull GitHub - FireFather/seagull: chess engine based on Gull 3] by [[Norman Schmidt]]
==Rating==
* [http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?print=Details&each_game=1&eng=Gull%201.2%2064-bit#Gull_1_2_64-bit Gull 1.2 64-bit] in [[CCRL|CCRL 40/40]]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?match_length=30&each_game=1&print=Details&each_game=1&eng=Gull%203%2064-bit%204CPU#Gull_3_64-bit_4CPU Gull 3 64-bit 4CPU] in [[CCRL|CCRL 40/40]]
==Misc==
* [https://en.wikipedia.org/wiki/Gull Gull (Seagull) from Wikipedia]
* [https://en.wikipedia.org/wiki/The_Birds_%28story%29 The Birds (story) from Wikipedia]
* [https://en.wikipedia.org/wiki/The_Birds_%28film%29 The Birds (film) from Wikipedia]
* [https://en.wikipedia.org/wiki/Frode_Aln%C3%A6s Frode Alnæs] - Gull av hav, Kanestrøm 2016, [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=rsBm3jzMHUo|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:UCI]]
