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Created page with "'''Home * Engines * Nirvanachess''' FILE:Mahaviras Nirvana from Kalpasutra.jpg|border|right|thumb| Mahavira's Nirvana <ref>[https://en.wikipedia.org/wiki/..."
'''[[Main Page|Home]] * [[Engines]] * Nirvanachess'''
[[FILE:Mahaviras Nirvana from Kalpasutra.jpg|border|right|thumb| Mahavira's Nirvana <ref>[https://en.wikipedia.org/wiki/Mahavira Mahavira's] [https://en.wikipedia.org/wiki/Nirvana Nirvana] or [https://en.wikipedia.org/wiki/Moksha Moksha]. Note the crescent shaped [https://en.wikipedia.org/wiki/Siddhashila Siddhashila] (a place where all [https://en.wikipedia.org/wiki/Siddha Siddhas] reside after Nirvana). Folio 53r from [https://en.wikipedia.org/wiki/Kalpa_S%C5%ABtra Kalpa Sūtra] series, loose leaf manuscript, [https://en.wikipedia.org/wiki/Patan,_Gujarat Patan, Gujarat], ca. 1472, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]
'''Nirvanachess''', (Nirvana)<br/>
an [[UCI]] compliant chess engine by [[Thomas Kolarik]], written in [[Cpp|C++]], first released in April 2013 <ref>[http://www.talkchess.com/forum/viewtopic.php?t=47750 Nirvanachess 1.0 Release] by [[Thomas Kolarik]], [[CCC]], April 10, 2013</ref>. Nirvanachess applies a [[Principal Variation Search|principal variation search]] with a four bucket [[Transposition Table|transposition table]], [[Null Move Pruning|null move pruning]], [[Late Move Reductions|late move reduction]], and [[Futility Pruning|futility pruning]] and [[Razoring|razoring]] with [[CLOP]] optimized margins inside an [[Iterative Deepening|iterative deepening framework]] with [[Aspiration Windows|aspiration windows]], [[Move Ordering|move ordering]] improved by the [[Killer Heuristic|killer heuristics]]. Its [[Evaluation|evaluation]] uses [[Material|material]] and [[Piece-Square Tables|piece-squares tables]], and further places emphasis on [[Mobility|mobility]], [[Pawn Structure|pawn structure]] with focus on [[Passed Pawn|passed pawns]] and [[Pawn Chain|pawn chains]], and [[King Safety|king safety]], considing [[King Safety#PawnStorm|pawn storms]], how many [[King Pattern#KingAttacks|squares around the king]] are attacked by how many attackers, and the quality of the [[King Safety#PawnShield|pawn shelter]] <ref>[http://nirvanachess.blogspot.com/ Nirvanachess]</ref>. Nirvana '''2.0''', released in December 2014, was a complete rewrite using [[Bitboards|bitboards]] instead of a [[10x12 Board|10x12 board]] with an improved evaluation and a [[Parallel Search|parallel search]] using the [[Lazy SMP|lazy SMP]] approach <ref>[http://www.talkchess.com/forum/viewtopic.php?t=54671 Nirvanachess 2.0 Release] by [[Thomas Kolarik]], [[CCC]], December 17, 2014</ref>. Nirvanachess '''2.1''' improved due to [[Singular Extensions#RestrictedSE|singular extensions]], [[Automated Tuning#LogisticRegression|logistic regression tuning]] aka [[Texel's Tuning Method]] of evaluation weights, as well as [[SPSA]] tuning for pruning margins <ref>[http://nirvanachess.blogspot.de/2015/05/nirvanachess-21-release.html Nirvanachess: Nirvanachess 2.1 Release], May 04, 2015</ref> <ref>[http://www.talkchess.com/forum/viewtopic.php?t=56239 Nirvanachess 2.1 Release] by [[Thomas Kolarik]], [[CCC]], May 05, 2015</ref>.
=See also=
* [[:Category:Metaphysics]]
=Forum Posts=
==2013==
* [http://www.talkchess.com/forum/viewtopic.php?t=47750 Nirvanachess 1.0 Release] by [[Thomas Kolarik]], [[CCC]], April 10, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=48186 Nirvanachess 1.1 Release] by [[Thomas Kolarik]], [[CCC]], June 03, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49053 Nirvanachess 1.2 Release] by [[Thomas Kolarik]], [[CCC]], August 22, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=50039 Nirvanachess 1.3 Release] by [[Thomas Kolarik]], [[CCC]], November 12, 2013
==2014==
* [http://www.talkchess.com/forum/viewtopic.php?t=50839 Nirvanachess 1.4 Release] by [[Thomas Kolarik]], [[CCC]], January 09, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=51500 Nirvanachess 1.5 Release] by [[Thomas Kolarik]], [[CCC]], March 05, 2014
* [http://www.talkchess.com/forum/viewtopic.php?p=560787 Hyper Bullet Rating List] by [[Thomas Kolarik]], [[CCC]], March 08, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=52041 Nirvanachess 1.6 Release] by [[Thomas Kolarik]], [[CCC]], April 18, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=52846 Nirvanachess 1.7 Release] by [[Thomas Kolarik]], [[CCC]], July 03, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=53448 Nirvanachess 1.8 Release] by [[Thomas Kolarik]], [[CCC]], August 27, 2014
* [http://www.talkchess.com/forum/viewtopic.php?p=590030 Transposition Table Oddity] by [[Thomas Kolarik]], [[CCC]], September 28, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=54671 Nirvanachess 2.0 Release] by [[Thomas Kolarik]], [[CCC]], December 17, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=56239 Nirvanachess 2.1 Release] by [[Thomas Kolarik]], [[CCC]], May 05, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=57948 Nirvanachess 2.2 Release] by [[Thomas Kolarik]], [[CCC]], October 15, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=61001 Nirvanachess 2.3 Release] by [[Thomas Kolarik]], [[CCC]], July 31, 2016
* [http://nirvanachess.blogspot.com/2017/08/nirvanachess-24-release.html Nirvanachess 2.4 Release] by [[Thomas Kolarik]], Nirvanachess , August 11, 2017 <ref>[http://www.talkchess.com/forum/viewtopic.php?t=64904 Nirvanachess 2.4 has been released] by [[Graham Banks]], [[CCC]], August 15, 2017</ref>
=External Links=
==Chess Engine==
* [http://nirvanachess.blogspot.com/ Nirvanachess]
* [http://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?match_length=30&each_game=1&print=Details&each_game=1&eng=NirvanaChess%201.7%2064-bit#NirvanaChess_1_7_64-bit NirvanaChess 1.7 64-bit] in [[CCRL|CCRL 40/4]]
==Misc==
* [https://en.wiktionary.org/wiki/nirvana nirvana - Wiktionary]
* [https://en.wikipedia.org/wiki/Nirvana_%28disambiguation%29 Nirvana (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Nirvana Nirvana from Wikipedia]
* [https://en.wikipedia.org/wiki/Nirvana_%28Buddhism%29 Nirvana (Buddhism) from Wikipedia]
* [[Videos#Nirvana|Nirvana]] - [https://en.wikipedia.org/wiki/Smells_Like_Teen_Spirit Smells Like Teen Spirit] (1991), [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=hTWKbfoikeg|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:UCI]]
[[Category:Metaphysics]]
[[FILE:Mahaviras Nirvana from Kalpasutra.jpg|border|right|thumb| Mahavira's Nirvana <ref>[https://en.wikipedia.org/wiki/Mahavira Mahavira's] [https://en.wikipedia.org/wiki/Nirvana Nirvana] or [https://en.wikipedia.org/wiki/Moksha Moksha]. Note the crescent shaped [https://en.wikipedia.org/wiki/Siddhashila Siddhashila] (a place where all [https://en.wikipedia.org/wiki/Siddha Siddhas] reside after Nirvana). Folio 53r from [https://en.wikipedia.org/wiki/Kalpa_S%C5%ABtra Kalpa Sūtra] series, loose leaf manuscript, [https://en.wikipedia.org/wiki/Patan,_Gujarat Patan, Gujarat], ca. 1472, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]
'''Nirvanachess''', (Nirvana)<br/>
an [[UCI]] compliant chess engine by [[Thomas Kolarik]], written in [[Cpp|C++]], first released in April 2013 <ref>[http://www.talkchess.com/forum/viewtopic.php?t=47750 Nirvanachess 1.0 Release] by [[Thomas Kolarik]], [[CCC]], April 10, 2013</ref>. Nirvanachess applies a [[Principal Variation Search|principal variation search]] with a four bucket [[Transposition Table|transposition table]], [[Null Move Pruning|null move pruning]], [[Late Move Reductions|late move reduction]], and [[Futility Pruning|futility pruning]] and [[Razoring|razoring]] with [[CLOP]] optimized margins inside an [[Iterative Deepening|iterative deepening framework]] with [[Aspiration Windows|aspiration windows]], [[Move Ordering|move ordering]] improved by the [[Killer Heuristic|killer heuristics]]. Its [[Evaluation|evaluation]] uses [[Material|material]] and [[Piece-Square Tables|piece-squares tables]], and further places emphasis on [[Mobility|mobility]], [[Pawn Structure|pawn structure]] with focus on [[Passed Pawn|passed pawns]] and [[Pawn Chain|pawn chains]], and [[King Safety|king safety]], considing [[King Safety#PawnStorm|pawn storms]], how many [[King Pattern#KingAttacks|squares around the king]] are attacked by how many attackers, and the quality of the [[King Safety#PawnShield|pawn shelter]] <ref>[http://nirvanachess.blogspot.com/ Nirvanachess]</ref>. Nirvana '''2.0''', released in December 2014, was a complete rewrite using [[Bitboards|bitboards]] instead of a [[10x12 Board|10x12 board]] with an improved evaluation and a [[Parallel Search|parallel search]] using the [[Lazy SMP|lazy SMP]] approach <ref>[http://www.talkchess.com/forum/viewtopic.php?t=54671 Nirvanachess 2.0 Release] by [[Thomas Kolarik]], [[CCC]], December 17, 2014</ref>. Nirvanachess '''2.1''' improved due to [[Singular Extensions#RestrictedSE|singular extensions]], [[Automated Tuning#LogisticRegression|logistic regression tuning]] aka [[Texel's Tuning Method]] of evaluation weights, as well as [[SPSA]] tuning for pruning margins <ref>[http://nirvanachess.blogspot.de/2015/05/nirvanachess-21-release.html Nirvanachess: Nirvanachess 2.1 Release], May 04, 2015</ref> <ref>[http://www.talkchess.com/forum/viewtopic.php?t=56239 Nirvanachess 2.1 Release] by [[Thomas Kolarik]], [[CCC]], May 05, 2015</ref>.
=See also=
* [[:Category:Metaphysics]]
=Forum Posts=
==2013==
* [http://www.talkchess.com/forum/viewtopic.php?t=47750 Nirvanachess 1.0 Release] by [[Thomas Kolarik]], [[CCC]], April 10, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=48186 Nirvanachess 1.1 Release] by [[Thomas Kolarik]], [[CCC]], June 03, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49053 Nirvanachess 1.2 Release] by [[Thomas Kolarik]], [[CCC]], August 22, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=50039 Nirvanachess 1.3 Release] by [[Thomas Kolarik]], [[CCC]], November 12, 2013
==2014==
* [http://www.talkchess.com/forum/viewtopic.php?t=50839 Nirvanachess 1.4 Release] by [[Thomas Kolarik]], [[CCC]], January 09, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=51500 Nirvanachess 1.5 Release] by [[Thomas Kolarik]], [[CCC]], March 05, 2014
* [http://www.talkchess.com/forum/viewtopic.php?p=560787 Hyper Bullet Rating List] by [[Thomas Kolarik]], [[CCC]], March 08, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=52041 Nirvanachess 1.6 Release] by [[Thomas Kolarik]], [[CCC]], April 18, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=52846 Nirvanachess 1.7 Release] by [[Thomas Kolarik]], [[CCC]], July 03, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=53448 Nirvanachess 1.8 Release] by [[Thomas Kolarik]], [[CCC]], August 27, 2014
* [http://www.talkchess.com/forum/viewtopic.php?p=590030 Transposition Table Oddity] by [[Thomas Kolarik]], [[CCC]], September 28, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=54671 Nirvanachess 2.0 Release] by [[Thomas Kolarik]], [[CCC]], December 17, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=56239 Nirvanachess 2.1 Release] by [[Thomas Kolarik]], [[CCC]], May 05, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=57948 Nirvanachess 2.2 Release] by [[Thomas Kolarik]], [[CCC]], October 15, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=61001 Nirvanachess 2.3 Release] by [[Thomas Kolarik]], [[CCC]], July 31, 2016
* [http://nirvanachess.blogspot.com/2017/08/nirvanachess-24-release.html Nirvanachess 2.4 Release] by [[Thomas Kolarik]], Nirvanachess , August 11, 2017 <ref>[http://www.talkchess.com/forum/viewtopic.php?t=64904 Nirvanachess 2.4 has been released] by [[Graham Banks]], [[CCC]], August 15, 2017</ref>
=External Links=
==Chess Engine==
* [http://nirvanachess.blogspot.com/ Nirvanachess]
* [http://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?match_length=30&each_game=1&print=Details&each_game=1&eng=NirvanaChess%201.7%2064-bit#NirvanaChess_1_7_64-bit NirvanaChess 1.7 64-bit] in [[CCRL|CCRL 40/4]]
==Misc==
* [https://en.wiktionary.org/wiki/nirvana nirvana - Wiktionary]
* [https://en.wikipedia.org/wiki/Nirvana_%28disambiguation%29 Nirvana (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Nirvana Nirvana from Wikipedia]
* [https://en.wikipedia.org/wiki/Nirvana_%28Buddhism%29 Nirvana (Buddhism) from Wikipedia]
* [[Videos#Nirvana|Nirvana]] - [https://en.wikipedia.org/wiki/Smells_Like_Teen_Spirit Smells Like Teen Spirit] (1991), [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=hTWKbfoikeg|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:UCI]]
[[Category:Metaphysics]]
