Difference between revisions of "Koivisto"
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'''[[Main Page|Home]] * [[Engines]] * Koivisto''' | '''[[Main Page|Home]] * [[Engines]] * Koivisto''' | ||
− | [[FILE:Hjalmar Munsterhjelm - Koivikko ja ruispelto - A II 1169 - Finnish National Gallery.jpg | + | [[FILE:Hjalmar Munsterhjelm - Koivikko ja ruispelto - A II 1169 - Finnish National Gallery.jpg|border|right|thumb| [[:Category:Hjalmar Munsterhjelm|Hjalmar Munsterhjelm]] - Koivikko ja ruispelto |
<ref>[[:Category:Hjalmar Munsterhjelm|Hjalmar Munsterhjelm]] - Koivikko ja ruispelto (Birch and rye field), 1876, [https://en.wikipedia.org/wiki/Finnish_National_Gallery Finnish National Gallery], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]] | <ref>[[:Category:Hjalmar Munsterhjelm|Hjalmar Munsterhjelm]] - Koivikko ja ruispelto (Birch and rye field), 1876, [https://en.wikipedia.org/wiki/Finnish_National_Gallery Finnish National Gallery], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]] | ||
Revision as of 14:25, 6 September 2020
Koivisto,
an UCI compliant open source chess engine by Finn Eggers et al., 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.
However, the current perceptron approach of the evaluation may soon be replaced by an own NNUE [2] [3].
Contents
Features
Board Representation
Search
Evaluation
- Tapered Eval
- Piece-Square Tables of floats
- Mobility
- Tactical Patterns
- Evaluation Patterns
- Pawn Structure
- King Safety
- Float SSE Dot products [4]
- Automated Tuning by Logistic Regression
Misc
- Syzygy Bases via Fathom
Forum Posts
- Re: New engine releases 2020 by Finn Eggers, CCC, September 02, 2020
- Re: New engine releases 2020 by Finn Eggers, CCC, September 03, 2020
- Koivisto by Gerd Isenberg, CCC, September 04, 2020
- Re: Koivisto by Finn Eggers, CCC, September 04, 2020
External Links
Chess Engine
Misc
References
- ↑ Hjalmar Munsterhjelm - Koivikko ja ruispelto (Birch and rye field), 1876, Finnish National Gallery, Wikimedia Commons
- ↑ Re: Koivisto by Finn Eggers, CCC, September 04, 2020
- ↑ History for src_files/nn - Luecx/Koivisto · GitHub
- ↑ Dot products using _mm_mul_ps, _mm_add_ps