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Created page with "'''Home * Engines * Weiss''' [[FILE:Weiss satellite craters map.jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Weiss_(crater) Weiss] and its satelli..."
'''[[Main Page|Home]] * [[Engines]] * Weiss'''
[[FILE:Weiss satellite craters map.jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Weiss_(crater) Weiss] and its satellite craters
<ref>[https://en.wikipedia.org/wiki/Weiss_(crater) Weiss] (named after Austrian astronomer [https://en.wikipedia.org/wiki/Edmund_Weiss Edmund Weiss]) and its satellite [https://en.wikipedia.org/wiki/Impact_crater craters] on the [https://en.wikipedia.org/wiki/Moon moon], [https://commons.wikimedia.org/wiki/File:Weiss_satellite_craters_map.jpg Image] by [https://commons.wikimedia.org/wiki/User:%D0%90%D0%BD%D0%B4%D1%80%D0%B5%D0%B9_%D0%A9%D0%B5%D1%80%D0%B1%D0%B0%D0%BA%D0%BE%D0%B2 Андрей Щербаков], October 30, 2013, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> <ref>[https://en.wikipedia.org/wiki/Moai Moais] are [https://en.wikipedia.org/wiki/Monolith monolithic] human figures carved by the [https://en.wikipedia.org/wiki/Rapa_Nui_people Rapa Nui people] on [https://en.wikipedia.org/wiki/Easter_Island Easter Island] in eastern [https://en.wikipedia.org/wiki/Polynesia Polynesia] between the years 1250 and 1500</ref> ]]
'''Weiss''', <br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] by [[Terje Kirstihagen]],
written in [[C]], first released in November 2019 under the [[Free Software Foundation#GPL|GPL 3]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72369 Engine release: weiss] by [[Terje Kirstihagen]], [[CCC]], November 19, 2019</ref>.
Weiss was initially based on [[Vice]] and is inspired by [[Ethereal]], [[Stockfish]] and [[Demolito]].
It is part of the [[OpenBench]] testing framework <ref>[https://github.com/TerjeKir/weiss/blob/master/README.md weiss/README.md at master · TerjeKir/weiss · GitHub]</ref>.
Weiss had its tournament debut at [[TCEC Season 18]] in May 2020.
=Features=
==[[Board Representation]]==
* [[Bitboard Board-Definition#SixTwo|Dense Bitboard Board-Definition]]
* [[8x8 Board]]
* [[Magic Bitboards#Fancy|Fancy Magic Bitboards]]
* [[BMI2#PEXTBitboards|PEXT Bitboards]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Selectivity]]
** [[Check Extensions]]
** [[Late Move Reductions]]
** [[Mate Distance Pruning]]
** [[Null Move Pruning]]
** [[Reverse Futility Pruning]]
** [[Futility Pruning#MoveCountBasedPruning|Late Move Pruning]]
** [[Razoring]]
** [[Quiescence Search]]
** [[Delta Pruning]]
* [[Move Ordering]]
** [[Hash Move]]
** [[Internal Iterative Deepening]]
** [[MVV-LVA|MVV/LVA]]
** [[Killer Heuristic]]
** [[History Heuristic]]
==[[Evaluation]]==
* [[Tapered Eval]]
* [[Material]]
* [[Bishop Pair]]
* [[Piece-Square Tables]]
* [[Mobility]]
* [[Rook on Open File|Rook on (Half) Open File]]
* [[Pawn Structure]]
** [[Passed Pawn]]
** [[Isolated Pawn]]
* [[King Safety#VMOB|King Safety - Virtual Mobility]]
* [[Tempo]]
* [[Automated Tuning]]
==Misc==
* [[Syzygy Bases]] using [[Syzygy Bases#Fathom|Fathom]]
* [[Perft]]
=Forum Posts=
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72369 Engine release: weiss] by [[Terje Kirstihagen]], [[CCC]], November 19, 2019
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=69754&start=422 Re: New engine releases 2019] by [[Terje Kirstihagen]], [[CCC]], December 06, 2019
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72613&start=10 Re: New engine releases 2020] by [[Terje Kirstihagen]], [[CCC]], January 07, 2020
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72613&start=71 Re: New engine releases 2020] by [[Terje Kirstihagen]], [[CCC]], February 14, 2020
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72613&start=170 Re: New engine releases 2020] by [[Terje Kirstihagen]], [[CCC]], April 25, 2020
=External Links=
==Chess Engine==
* [https://github.com/TerjeKir/weiss GitHub - GitHub - TerjeKir/weiss: Weiss - a UCI chess engine]
* [https://ccrl.chessdom.com/ccrl/4040/cgi/compare_engines.cgi?family=Weiss&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 Weiss] in [[CCRL|CCRL 40/15]]
==Misc==
* [https://en.wiktionary.org/wiki/weiss weiss - Wiktionary]
* [https://en.wiktionary.org/wiki/Weiss Weiss - Wiktionary]
* [https://en.wiktionary.org/wiki/wei%C3%9F weiß - Wiktionary]
* [https://en.wiktionary.org/wiki/white white - Wiktionary]
* [https://en.wikipedia.org/wiki/Weiss Weiss from Wikipedia]
* [https://en.wikipedia.org/wiki/Weiss_(crater) Weiss (crater) from Wikipedia]
* [https://de.wikipedia.org/wiki/Wei%C3%9F Weiß – Wikipedia.de] (German)
* [https://en.wikipedia.org/wiki/White White from Wikipedia]
* [https://no.wikipedia.org/wiki/Hvit Hvit – Wikipedia.no] (Bokmål)
* [https://nn.wikipedia.org/wiki/Kvit Kvit – Wikipedia.nn] (Nynorsk)
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:UCI]]
[[Category:Open Source]]
[[Category:GPL]]
[[Category:PC]]
[[Category:X64]]
[[Category:Linux]]
[[Category:Windows]]
[[Category:Astronomy]]
[[FILE:Weiss satellite craters map.jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Weiss_(crater) Weiss] and its satellite craters
<ref>[https://en.wikipedia.org/wiki/Weiss_(crater) Weiss] (named after Austrian astronomer [https://en.wikipedia.org/wiki/Edmund_Weiss Edmund Weiss]) and its satellite [https://en.wikipedia.org/wiki/Impact_crater craters] on the [https://en.wikipedia.org/wiki/Moon moon], [https://commons.wikimedia.org/wiki/File:Weiss_satellite_craters_map.jpg Image] by [https://commons.wikimedia.org/wiki/User:%D0%90%D0%BD%D0%B4%D1%80%D0%B5%D0%B9_%D0%A9%D0%B5%D1%80%D0%B1%D0%B0%D0%BA%D0%BE%D0%B2 Андрей Щербаков], October 30, 2013, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> <ref>[https://en.wikipedia.org/wiki/Moai Moais] are [https://en.wikipedia.org/wiki/Monolith monolithic] human figures carved by the [https://en.wikipedia.org/wiki/Rapa_Nui_people Rapa Nui people] on [https://en.wikipedia.org/wiki/Easter_Island Easter Island] in eastern [https://en.wikipedia.org/wiki/Polynesia Polynesia] between the years 1250 and 1500</ref> ]]
'''Weiss''', <br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] by [[Terje Kirstihagen]],
written in [[C]], first released in November 2019 under the [[Free Software Foundation#GPL|GPL 3]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72369 Engine release: weiss] by [[Terje Kirstihagen]], [[CCC]], November 19, 2019</ref>.
Weiss was initially based on [[Vice]] and is inspired by [[Ethereal]], [[Stockfish]] and [[Demolito]].
It is part of the [[OpenBench]] testing framework <ref>[https://github.com/TerjeKir/weiss/blob/master/README.md weiss/README.md at master · TerjeKir/weiss · GitHub]</ref>.
Weiss had its tournament debut at [[TCEC Season 18]] in May 2020.
=Features=
==[[Board Representation]]==
* [[Bitboard Board-Definition#SixTwo|Dense Bitboard Board-Definition]]
* [[8x8 Board]]
* [[Magic Bitboards#Fancy|Fancy Magic Bitboards]]
* [[BMI2#PEXTBitboards|PEXT Bitboards]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Selectivity]]
** [[Check Extensions]]
** [[Late Move Reductions]]
** [[Mate Distance Pruning]]
** [[Null Move Pruning]]
** [[Reverse Futility Pruning]]
** [[Futility Pruning#MoveCountBasedPruning|Late Move Pruning]]
** [[Razoring]]
** [[Quiescence Search]]
** [[Delta Pruning]]
* [[Move Ordering]]
** [[Hash Move]]
** [[Internal Iterative Deepening]]
** [[MVV-LVA|MVV/LVA]]
** [[Killer Heuristic]]
** [[History Heuristic]]
==[[Evaluation]]==
* [[Tapered Eval]]
* [[Material]]
* [[Bishop Pair]]
* [[Piece-Square Tables]]
* [[Mobility]]
* [[Rook on Open File|Rook on (Half) Open File]]
* [[Pawn Structure]]
** [[Passed Pawn]]
** [[Isolated Pawn]]
* [[King Safety#VMOB|King Safety - Virtual Mobility]]
* [[Tempo]]
* [[Automated Tuning]]
==Misc==
* [[Syzygy Bases]] using [[Syzygy Bases#Fathom|Fathom]]
* [[Perft]]
=Forum Posts=
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72369 Engine release: weiss] by [[Terje Kirstihagen]], [[CCC]], November 19, 2019
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=69754&start=422 Re: New engine releases 2019] by [[Terje Kirstihagen]], [[CCC]], December 06, 2019
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72613&start=10 Re: New engine releases 2020] by [[Terje Kirstihagen]], [[CCC]], January 07, 2020
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72613&start=71 Re: New engine releases 2020] by [[Terje Kirstihagen]], [[CCC]], February 14, 2020
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72613&start=170 Re: New engine releases 2020] by [[Terje Kirstihagen]], [[CCC]], April 25, 2020
=External Links=
==Chess Engine==
* [https://github.com/TerjeKir/weiss GitHub - GitHub - TerjeKir/weiss: Weiss - a UCI chess engine]
* [https://ccrl.chessdom.com/ccrl/4040/cgi/compare_engines.cgi?family=Weiss&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 Weiss] in [[CCRL|CCRL 40/15]]
==Misc==
* [https://en.wiktionary.org/wiki/weiss weiss - Wiktionary]
* [https://en.wiktionary.org/wiki/Weiss Weiss - Wiktionary]
* [https://en.wiktionary.org/wiki/wei%C3%9F weiß - Wiktionary]
* [https://en.wiktionary.org/wiki/white white - Wiktionary]
* [https://en.wikipedia.org/wiki/Weiss Weiss from Wikipedia]
* [https://en.wikipedia.org/wiki/Weiss_(crater) Weiss (crater) from Wikipedia]
* [https://de.wikipedia.org/wiki/Wei%C3%9F Weiß – Wikipedia.de] (German)
* [https://en.wikipedia.org/wiki/White White from Wikipedia]
* [https://no.wikipedia.org/wiki/Hvit Hvit – Wikipedia.no] (Bokmål)
* [https://nn.wikipedia.org/wiki/Kvit Kvit – Wikipedia.nn] (Nynorsk)
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:UCI]]
[[Category:Open Source]]
[[Category:GPL]]
[[Category:PC]]
[[Category:X64]]
[[Category:Linux]]
[[Category:Windows]]
[[Category:Astronomy]]
