Difference between revisions of "Koivisto"

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The [[Bitboards|bitboard]] engine provides [[Automated Tuning|automated evaluation tuning]] by [[Automated Tuning#LogisticRegression|logistic regression]],
 
The [[Bitboards|bitboard]] engine provides [[Automated Tuning|automated evaluation tuning]] by [[Automated Tuning#LogisticRegression|logistic regression]],
 
either using [https://en.wikipedia.org/wiki/Stochastic_gradient_descent stochastic gradient descent] or [https://en.wikipedia.org/wiki/Stochastic_gradient_descent#AdaGrad AdaGrad].
 
either using [https://en.wikipedia.org/wiki/Stochastic_gradient_descent stochastic gradient descent] or [https://en.wikipedia.org/wiki/Stochastic_gradient_descent#AdaGrad AdaGrad].
Koivisto '''5.0''' in July 2021 replaced the [[Neural Networks#Perceptron|perceptron]] approach of a real-men-evaluation (RME) by an own [[NNUE]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=75001&start=4 Re: Koivisto] by [[Finn Eggers]], [[CCC]], September 04, 2020</ref>  <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=77664 Koivisto 5.0] by [[Finn Eggers]], [[CCC]], July 07, 2021</ref>.
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Koivisto '''5.0''' in July 2021 replaced the [[Neural Networks#Perceptron|perceptron]] approach of a real-men-evaluation (RME) by an own [[NNUE]], as of Koivisto '''5.9''', with two layers <ref>[https://github.com/Luecx/Koivisto/wiki/Evaluation Evaluation · Luecx/Koivisto Wiki · GitHub]</ref>.
 
   
 
   
 
=Features=
 
=Features=
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==Chess Engine==
 
==Chess Engine==
 
* [https://github.com/Luecx/Koivisto GitHub - Luecx/Koivisto: UCI Chess engine]
 
* [https://github.com/Luecx/Koivisto GitHub - Luecx/Koivisto: UCI Chess engine]
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** [https://github.com/Luecx/Koivisto/wiki/Evaluation Evaluation · Luecx/Koivisto Wiki · GitHub]
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** [https://github.com/Luecx/Koivisto/wiki/Regression-tests Regression tests · Luecx/Koivisto Wiki · GitHub]
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* [https://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Koivisto&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 Koivisto] in [[CCRL|CCRL 40/15]]
 
==Misc==
 
==Misc==
 
* [https://en.wiktionary.org/wiki/Koivisto Koivisto - Wiktionary]
 
* [https://en.wiktionary.org/wiki/Koivisto Koivisto - Wiktionary]

Revision as of 21:24, 21 July 2021

Home * Engines * Koivisto

Hjalmar Munsterhjelm - Koivikko ja ruispelto [1]

Koivisto,
an UCI compliant open source chess engine by Kim Kåhre and Finn Eggers, at times supported by Eugenio Bruno, written in C++, and first released on GitHub in September 2020 under the GPL v3.0. The bitboard engine provides automated evaluation tuning by logistic regression, either using stochastic gradient descent or AdaGrad. Koivisto 5.0 in July 2021 replaced the perceptron approach of a real-men-evaluation (RME) by an own NNUE, as of Koivisto 5.9, with two layers [2].

Features

Board Representation

Search

Evaluation

Misc

Forum Posts

Re: New engine releases 2020 by Finn Eggers, CCC, September 03, 2020
Re: Koivisto by Finn Eggers, CCC, September 04, 2020

External Links

Chess Engine

Misc

koivikko - Wiktionary

References

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