Clover - UCI chess engine
Author: Luca Metehau Rating JCER=3141 (15'+10")
Clover, an UCI compliant open source chess engine by Luca Metehau, written in C++. Clover was first released in April 2021 [2], hosted on GitHub. In January 2022, Clover 3.0 was released featuring NNUE instead of hand crafted evaluation [source: Chess Program Wiki].
After almost 2 months, Clover 2.4 is here! It is about 100 elo stronger than Clover 2.3.1 in self-play. The strength comes from the new tuner (thanks Andrew Grant for the Tuning Paper), new eval terms, bug fixes and search tweaks.
Individual statistics: Clover 3.0 - 183 games (+ 52,= 68,- 63), 47.0 %, Time: 15'+10"
Komodo 12.1.1 : 4 (+ 1,= 1,- 2), 37.5 %
Fritz 17 : 8 (+ 1,= 5,- 2), 43.8 %
Fire 8 NN MC.3 : 4 (+ 0,= 3,- 1), 37.5 %
Gogobello 3.0 : 1 (+ 0,= 1,- 0), 50.0 %
GreKo 2021.08 NNUE : 2 (+ 0,= 1,- 1), 25.0 %
Xiphos 0.6.1 : 2 (+ 0,= 2,- 0), 50.0 %
Tornado Dec 9 2020 : 1 (+ 0,= 1,- 0), 50.0 %
Laser 1.7 : 2 (+ 0,= 2,- 0), 50.0 %
RofChade 2.3 : 2 (+ 1,= 0,- 1), 50.0 %
Booot 6.5 : 2 (+ 0,= 2,- 0), 50.0 %
Defenchess 2.3 : 2 (+ 0,= 2,- 0), 50.0 %
Roc 2020Aug05 : 2 (+ 1,= 1,- 0), 75.0 %
DanaSah 9.0 : 1 (+ 0,= 1,- 0), 50.0 %
Weiss 2.0 : 1 (+ 0,= 1,- 0), 50.0 %
Barbarossa 0.6.0 : 2 (+ 2,= 0,- 0), 100.0 %
Cheng4 0.41 : 2 (+ 2,= 0,- 0), 100.0 %
Colossus 2021b : 4 (+ 4,= 0,- 0), 100.0 %
Stockfish 14.1 : 8 (+ 0,= 2,- 6), 12.5 %
Stockfish 13 : 5 (+ 0,= 2,- 3), 20.0 %
Igel 3.0.10 : 2 (+ 1,= 1,- 0), 75.0 %
Zahak 9.0 : 2 (+ 0,= 2,- 0), 50.0 %
Fisherov 0.98i : 6 (+ 0,= 0,- 6), 0.0 %
Arasan 23.2 : 6 (+ 0,= 4,- 2), 33.3 %
Seer 2.4.0 : 2 (+ 0,= 2,- 0), 50.0 %
Fisherov 0.98j : 6 (+ 0,= 2,- 4), 16.7 %
Kayra 1.1 : 2 (+ 0,= 0,- 2), 0.0 %
Lc0 0.28.2 : 2 (+ 0,= 1,- 1), 25.0 %
Wasp 5.20 second compiles : 2 (+ 0,= 2,- 0), 50.0 %
Fritz 15 : 2 (+ 2,= 0,- 0), 100.0 %
Minic 3.18 : 2 (+ 0,= 2,- 0), 50.0 %
Bagatur 3.2 : 2 (+ 0,= 2,- 0), 50.0 %
Cheese 3.0.1 : 4 (+ 4,= 0,- 0), 100.0 %
Black Marlin 4.0 : 2 (+ 1,= 1,- 0), 75.0 %
Combusken 2.0.0 : 4 (+ 1,= 2,- 1), 50.0 %
Tucano 10.00 : 2 (+ 0,= 1,- 1), 25.0 %
Drofa 3.3.0 : 2 (+ 1,= 1,- 0), 75.0 %
Little Goliath 3.15 : 6 (+ 4,= 1,- 1), 75.0 %
Velvet 3.1.3 : 6 (+ 4,= 2,- 0), 83.3 %
Protej 0.6.1 : 2 (+ 1,= 1,- 0), 75.0 %
Stockfish 250122 : 2 (+ 0,= 0,- 2), 0.0 %
Anka 0.6.3 : 2 (+ 2,= 0,- 0), 100.0 %
Belofte 2.1.5 : 2 (+ 2,= 0,- 0), 100.0 %
CorChess 250122 : 2 (+ 0,= 0,- 2), 0.0 %
Stockfish 250122 Ivec : 4 (+ 0,= 1,- 3), 12.5 %
Raubfisch X48c3 : 2 (+ 0,= 1,- 1), 25.0 %
Rebel 14.1 NNUE : 4 (+ 2,= 1,- 1), 62.5 %
Protej 0.6.2 : 1 (+ 1,= 0,- 0), 100.0 %
Stockfish 290122 : 2 (+ 0,= 0,- 2), 0.0 %
Little Goliath 3.15.3 NN : 2 (+ 0,= 2,- 0), 50.0 %
Berserk 9-dev NN : 6 (+ 0,= 1,- 5), 8.3 %
Koivisto 7.13 : 4 (+ 1,= 1,- 2), 37.5 %
Blunder 7.6.0 : 2 (+ 2,= 0,- 0), 100.0 %
Mayhem 6.6 : 2 (+ 0,= 2,- 0), 50.0 %
Mayhem 6.7 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 170222 : 4 (+ 0,= 0,- 4), 0.0 %
Keele 1.0 : 4 (+ 4,= 0,- 0), 100.0 %
Fire 8.2 : 4 (+ 1,= 0,- 3), 25.0 %
Leorik 1.0 : 2 (+ 2,= 0,- 0), 100.0 %
Eggnog 3.0 : 2 (+ 2,= 0,- 0), 100.0 %
Velvet 3.2.0 : 3 (+ 2,= 1,- 0), 83.3 %
Raubfisch X48d : 3 (+ 0,= 1,- 2), 16.7 %
Stockfish 050222 : 3 (+ 0,= 1,- 2), 16.7 %
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