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Chess engine: Koivisto 8.16 - 16-binary (Ipman compiles)

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Koivisto, is a strong chess engine written primarily by Kim Kåhre and Finn Eggers in c++. Koivisto in itself is not a complete chess program and requires a UCI-compatible graphical user interface.

Rating CEDR=3379 (6 place) - Time:15'+10"  Rating CEDR=3481 (8 place) - Time 3'+3"

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 [source].

Individual statistics: Koivisto 8.8 - 76 games (+ 31,= 35,- 10), 63.8 %
Fritz 17                      :   2 (+  1,=  1,-  0), 75.0 %
Kayra 1.3                     :   2 (+  0,=  2,-  0), 50.0 %
Stockfish 15                  :   4 (+  0,=  2,-  2), 25.0 %
Fisherov 0.98k                :   4 (+  0,=  3,-  1), 37.5 %
BrainLearn 17                 :   2 (+  0,=  1,-  1), 25.0 %
Wasp 5.50                     :   2 (+  1,=  1,-  0), 75.0 %
Rebel 15                      :   2 (+  2,=  0,-  0), 100.0 %
Fisherov 0.98j                :   2 (+  0,=  1,-  1), 25.0 %
Komodo 13.02                  :   4 (+  1,=  2,-  1), 50.0 %
Arasan 23.3                   :   2 (+  0,=  2,-  0), 50.0 %
Zahak 10.0                    :   2 (+  2,=  0,-  0), 100.0 %
Hiarcs 15.5                   :   4 (+  0,=  4,-  0), 50.0 %
Caligula 1.0b                 :   2 (+  2,=  0,-  0), 100.0 %
Protej 0.6.2                  :   2 (+  2,=  0,-  0), 100.0 %
Caissa 0.5 NNUE               :   4 (+  1,=  3,-  0), 62.5 %
Stash 33.0                    :   2 (+  1,=  1,-  0), 75.0 %
Horowitz 2.1                  :   2 (+  2,=  0,-  0), 100.0 %
Rebel 15x2                    :   4 (+  2,=  2,-  0), 75.0 %
Minic 3.19                    :   2 (+  0,=  2,-  0), 50.0 %
Stockfish 140522              :   2 (+  0,=  1,-  1), 25.0 %
StockfishMZ 170522            :   4 (+  0,=  3,-  1), 37.5 %
ProteusSF RBE 008             :   4 (+  0,=  2,-  2), 25.0 %
Nalwald 15                    :   2 (+  2,=  0,-  0), 100.0 %
Colossus 2022a                :   4 (+  4,=  0,-  0), 100.0 %
Berserk 9-dev                 :   2 (+  0,=  2,-  0), 50.0 %
Vafra 3.3.2                   :   4 (+  4,=  0,-  0), 100.0 %
Halogen 10.23.11              :   2 (+  2,=  0,-  0), 100.0 %
Halogen 10.22                 :   2 (+  2,=  0,-  0), 100.0 %

Koivisto 8.16 - 16 binary (Ipman compiles) - download

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