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Created page with "'''Home * Engines * Atlas''' FILE:Atlas Santiago Toural GFDL.jpg|border|right|thumb| Sculpture of [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atl..."
'''[[Main Page|Home]] * [[Engines]] * Atlas'''
[[FILE:Atlas Santiago Toural GFDL.jpg|border|right|thumb| Sculpture of [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas]
<ref>Sculpture of [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas], Praza do Toural, [https://en.wikipedia.org/wiki/Santiago_de_Compostela Santiago de Compostela], Photo by [https://commons.wikimedia.org/wiki/User:Lmbuga Luis Miguel Bugallo Sánchez], October 18, 2005, [https://creativecommons.org/licenses/by-sa/3.0/deed.en CC BY-SA 3.0], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons], [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas (mythology) from Wikipedia]</ref> ]]
'''Atlas''',<br/>
an [[UCI]] compliant chess engine by [[Andrés Manzanares Campillo]] written in [[Cpp|C++]] - executables running under [[Linux]] and [[Windows]].
The development of Atlas started in 2004, initially [[Board Representation|representing the board]] as [[0x88]] [[Vector Attacks|vector attacks]] [[Mailbox|mailbox]] along with [[Piece-Lists|piece-lists]],
supporting [[WinBoard]], and written in [[C]]. Atlas '''2.90''' was a complete rewrite released in June 2011, a [[Bitboards|bitboard]] approach only supporting UCI <ref>[https://sites.google.com/site/atlaschess/home/progreso Progreso - Atlas]</ref>.
=Features=
<ref>Features of Atlas 3.80 based on [https://sites.google.com/site/atlaschess/ Atlas - Home] and [http://www.talkchess.com/forum/viewtopic.php?t=55234 Atlas 3.80 release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], February 06, 2015</ref>
==[[Board Representation]]==
* [[Bitboards]]
* [[Magic Bitboards]] <ref>[https://sites.google.com/site/atlaschess/home Atlas - Home - Agradecimientos]</ref>
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]] (unsymmetrical)
* [[Principal Variation Search]]
* [[Quiescence Search]]
* [[Null Move Pruning]] with [[Depth Reduction R|R==3]] and [[Null Move Pruning#ZugzwangVerification|Verification]]
* [[Futility Pruning]]
* [[Static Exchange Evaluation|SEE Pruning]]
* [[Late Move Reductions]]
* [[Check Extensions]]
* [[Singular Extensions]] (3.90)
* [[Transposition Table]]
* [[History Heuristic]]
==[[Evaluation]]==
* [[Material]]
* [[Material Hash Table]]
* [[Piece-Square Tables]]
* [[Mobility]] (non-linear)
* [[Pawn Structure]]
* [[Pawn Hash Table]]
* [[King Safety]]
=Namesake=
* [[Atlas]] by [[Alex Bell]]
=Forum Posts=
==2005 ...==
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=2330 Atlas 2 Winboard Engine crashes in Arena GUI] by Marc Darius, [[Computer Chess Forums|Winboard Forum]], April 20, 2005
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=5473 Atlas 2.20 hash usage] by [[Graham Banks]], [[Computer Chess Forums|Winboard Forum]], August 27, 2006
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=6103 Confused with Atlas 2.20- Help Appreciated] by [[George Speight]], [[Computer Chess Forums|Winboard Forum]], January 12, 2007
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=50131 Atlas 3.60 Release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], November 18, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=53021 Atlas 3.70em Release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], July 20, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=55234 Atlas 3.80 release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], February 06, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=66387 Atlas 3.90 release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], January 22, 2018
* [http://www.talkchess.com/forum/viewtopic.php?t=66416 Atlas 3.91 (bugfix version)] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], January 26, 2018
=External Links=
==Chess Engine==
* [https://sites.google.com/site/atlaschess/ Atlas - Home]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Atlas&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 Atlas] in [[CCRL|CCRL 40/15]]
==Misc==
* [https://en.wikipedia.org/wiki/Atlas_%28computer%29 Atlas (computer) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28disambiguation%29 Atlas (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas Atlas from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_Mountains Atlas Mountains from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas (mythology) from Wikipedia]
* [https://en.wikipedia.org/wiki/Farnese_Atlas Farnese Atlas from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28rocket_family%29 Atlas (rocket family) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28star%29 Atlas (star) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28moon%29 Atlas (moon) from Wikipedia]
* [https://en.wikipedia.org/wiki/Colossochelys_atlas Colossochelys atlas from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:UCI]]
[[Category:X86]]
[[Category:X64]]
[[Category:PC]]
[[Category:Linux]]
[[Category:Window]]
[[Category:Astronomy]]
[[Category:Geography]]
[[Category:Mythology]]
[[Category:Namesake]]
[[FILE:Atlas Santiago Toural GFDL.jpg|border|right|thumb| Sculpture of [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas]
<ref>Sculpture of [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas], Praza do Toural, [https://en.wikipedia.org/wiki/Santiago_de_Compostela Santiago de Compostela], Photo by [https://commons.wikimedia.org/wiki/User:Lmbuga Luis Miguel Bugallo Sánchez], October 18, 2005, [https://creativecommons.org/licenses/by-sa/3.0/deed.en CC BY-SA 3.0], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons], [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas (mythology) from Wikipedia]</ref> ]]
'''Atlas''',<br/>
an [[UCI]] compliant chess engine by [[Andrés Manzanares Campillo]] written in [[Cpp|C++]] - executables running under [[Linux]] and [[Windows]].
The development of Atlas started in 2004, initially [[Board Representation|representing the board]] as [[0x88]] [[Vector Attacks|vector attacks]] [[Mailbox|mailbox]] along with [[Piece-Lists|piece-lists]],
supporting [[WinBoard]], and written in [[C]]. Atlas '''2.90''' was a complete rewrite released in June 2011, a [[Bitboards|bitboard]] approach only supporting UCI <ref>[https://sites.google.com/site/atlaschess/home/progreso Progreso - Atlas]</ref>.
=Features=
<ref>Features of Atlas 3.80 based on [https://sites.google.com/site/atlaschess/ Atlas - Home] and [http://www.talkchess.com/forum/viewtopic.php?t=55234 Atlas 3.80 release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], February 06, 2015</ref>
==[[Board Representation]]==
* [[Bitboards]]
* [[Magic Bitboards]] <ref>[https://sites.google.com/site/atlaschess/home Atlas - Home - Agradecimientos]</ref>
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]] (unsymmetrical)
* [[Principal Variation Search]]
* [[Quiescence Search]]
* [[Null Move Pruning]] with [[Depth Reduction R|R==3]] and [[Null Move Pruning#ZugzwangVerification|Verification]]
* [[Futility Pruning]]
* [[Static Exchange Evaluation|SEE Pruning]]
* [[Late Move Reductions]]
* [[Check Extensions]]
* [[Singular Extensions]] (3.90)
* [[Transposition Table]]
* [[History Heuristic]]
==[[Evaluation]]==
* [[Material]]
* [[Material Hash Table]]
* [[Piece-Square Tables]]
* [[Mobility]] (non-linear)
* [[Pawn Structure]]
* [[Pawn Hash Table]]
* [[King Safety]]
=Namesake=
* [[Atlas]] by [[Alex Bell]]
=Forum Posts=
==2005 ...==
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=2330 Atlas 2 Winboard Engine crashes in Arena GUI] by Marc Darius, [[Computer Chess Forums|Winboard Forum]], April 20, 2005
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=5473 Atlas 2.20 hash usage] by [[Graham Banks]], [[Computer Chess Forums|Winboard Forum]], August 27, 2006
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=6103 Confused with Atlas 2.20- Help Appreciated] by [[George Speight]], [[Computer Chess Forums|Winboard Forum]], January 12, 2007
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=50131 Atlas 3.60 Release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], November 18, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=53021 Atlas 3.70em Release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], July 20, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=55234 Atlas 3.80 release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], February 06, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=66387 Atlas 3.90 release] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], January 22, 2018
* [http://www.talkchess.com/forum/viewtopic.php?t=66416 Atlas 3.91 (bugfix version)] by [[Andrés Manzanares Campillo|Andrés Manzanares]], [[CCC]], January 26, 2018
=External Links=
==Chess Engine==
* [https://sites.google.com/site/atlaschess/ Atlas - Home]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Atlas&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 Atlas] in [[CCRL|CCRL 40/15]]
==Misc==
* [https://en.wikipedia.org/wiki/Atlas_%28computer%29 Atlas (computer) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28disambiguation%29 Atlas (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas Atlas from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_Mountains Atlas Mountains from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28mythology%29 Atlas (mythology) from Wikipedia]
* [https://en.wikipedia.org/wiki/Farnese_Atlas Farnese Atlas from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28rocket_family%29 Atlas (rocket family) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28star%29 Atlas (star) from Wikipedia]
* [https://en.wikipedia.org/wiki/Atlas_%28moon%29 Atlas (moon) from Wikipedia]
* [https://en.wikipedia.org/wiki/Colossochelys_atlas Colossochelys atlas from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:UCI]]
[[Category:X86]]
[[Category:X64]]
[[Category:PC]]
[[Category:Linux]]
[[Category:Window]]
[[Category:Astronomy]]
[[Category:Geography]]
[[Category:Mythology]]
[[Category:Namesake]]
