Zagreus is a work in progress UCI Chess Engine. You can play against Zagreus on Lichess: https://lichess.org/@/Zagreus_Engine. You will also be able to find it's elo rating on there. At the time of writing this is around ~1800 rapid.
Zagreus is a constantly changing engine with hopefully an increase in elo every update.
Author:Manuel Diaz Rating CEDR=2016
v. 3.0:
This is a pretty big update coming with a complete evaluation rewrite, improving performance, improvements to the gradient descent tuner and fixing a good amount of issues. Self-play shows a pretty good ELO change (although the real change against other engines is usually less).
ELO Change
Elo | 160.52 +- 30.39 (95%)
SPRT | 60.0+0.60s Threads=1 Hash=64MB
LLR | 1.33 (-2.94, 2.94) [0.50, 2.50]
Games | N: 542 W: 347 L: 113 D: 82
Penta | [9, 13, 88, 57, 104]
What's Changed
Smarter/better time management by @Dannyj1 in #48
Cleanup of search code by @Dannyj1 in #49
Fix TT move sorting by @Dannyj1 in #50
Simplify versioning scheme, no more "patch" versions by @Dannyj1 in #51
Also add fail-low nodes to the TT by @Dannyj1 in #52
Tuner improvements and fixes by @Dannyj1 in #55
Evaluation rework by @Dannyj1 in #54
Use central finite difference for gradient estimation by @Dannyj1 in #58
Individual statistics: Zagreus 2.0.0 alpha-2 - 105 games (+ 7,= 1,- 97), 7.1 %
Critter 1.6a : 8 (+ 0,= 0,- 8), 0.0 %
Houdini 1.5a : 2 (+ 0,= 0,- 2), 0.0 %
ECE 20.1 : 2 (+ 0,= 0,- 2), 0.0 %
Xiphos 0.6.1 : 2 (+ 0,= 0,- 2), 0.0 %
Komodo 13.02 : 2 (+ 0,= 0,- 2), 0.0 %
Coiled 1.1 : 2 (+ 0,= 0,- 2), 0.0 %
Protej 0.6.3 : 2 (+ 0,= 0,- 2), 0.0 %
Lozza 2.4 : 2 (+ 0,= 0,- 2), 0.0 %
Expositor 2BR17 : 2 (+ 0,= 0,- 2), 0.0 %
Kayra 1.7 : 2 (+ 0,= 0,- 2), 0.0 %
Igel 3.3.0 : 6 (+ 0,= 0,- 6), 0.0 %
Inanis 1.2.0 : 4 (+ 0,= 0,- 4), 0.0 %
Koivisto 9.0 : 6 (+ 0,= 0,- 6), 0.0 %
Caissa 1.5 : 6 (+ 0,= 0,- 6), 0.0 %
Frozenight 6.0.0 : 4 (+ 0,= 0,- 4), 0.0 %
Jangine 2023-01-15 : 3 (+ 1,= 0,- 2), 33.3 %
Renegade 0.7.0 : 4 (+ 0,= 0,- 4), 0.0 %
Mess 0.0.2 : 2 (+ 0,= 0,- 2), 0.0 %
Clovis II : 8 (+ 0,= 0,- 8), 0.0 %
Durandal 0.1.1 : 6 (+ 6,= 0,- 0), 100.0 %
Princhess 0.9.0 : 6 (+ 0,= 1,- 5), 8.3 %
Wasabi 1.5.0 : 2 (+ 0,= 0,- 2), 0.0 %
Sturddle 1.27 : 8 (+ 0,= 0,- 8), 0.0 %
Sting Black Hole 4 : 6 (+ 0,= 0,- 6), 0.0 %
BlackMarlin 7.0 : 2 (+ 0,= 0,- 2), 0.0 %
Corchess 20230125 : 2 (+ 0,= 0,- 2), 0.0 %
Viridithas 7.0.0 : 2 (+ 0,= 0,- 2), 0.0 %
Protej 0.6.4 : 2 (+ 0,= 0,- 2), 0.0 %
Github:https://github.com/Dannyj1/Zagreus/releases/tag/v3.0
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