Lunar 0.4.0 - new version chess engine

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Lunar - UCI chess engine
Author: Patrick Hilhorst

Lunar 0.4.0 - what's new in this version?

Lunar 0.4.0 is out! Strength increases due to:
Larger net (from 512 to 1024)
Various speedups (though overall nps is lower due to the larger net)
Correction history
Some bugfixes

Lunar 0.4.0 - Playing strength?

Roughly 3500 CCRL Blitz. Results on the progress tests were a bit mixed (and I did fewer than last time), so error bars are fairly large here. so please don't hurt me if this estimate is a bit off 😔

+136 Balanced book STC vs lunar 0.3.0
Elo   | 136.46 +- 7.69 (95%)
Conf  | 8.0+0.08s Threads=1 Hash=64MB
Games | N: 4000 W: 1801 L: 306 D: 1893
Penta | [9, 135, 598, 868, 390]
https://synthetica.eu.pythonanywhere.com/test/373/

+155 Balanced book LTC vs lunar 0.3.0
Elo   | 155.61 +- 10.11 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=128MB
Games | N: 2004 W: 899 L: 57 D: 1048
Penta | [1, 21, 316, 463, 201]
https://synthetica.eu.pythonanywhere.com/test/374/

-55 Balanced book LTC vs Halogen 12
Elo   | -56.25 +- 8.39 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=128MB
Games | N: 2000 W: 198 L: 519 D: 1283
Penta | [55, 326, 510, 103, 6]

Lunar 0.2.1 vs other engines:

Ironfang 1.02/4+04 Games
Kraken 2025-06-162/3+13 Games
Fridolin 4.00 JA1.5/3+03 Games
Libra-chess 1.0.12/2+22 Games
Maelstrom 2.1.02/2+22 Games
Aku 2025.6.12 JA2/2+22 Games
Freda 1.12/2+22 Games
Emerald 0.3.02/2+22 Games
Celeris 1.01.5/2+12 Games
Pzchessbot 2.01/2+02 Games
Stormphrax 7.0.00.5/2-12 Games
Fire 9.3 JA0.5/2-12 Games
Zangdar 4.040/2-22 Games
Zangdar 4.04 JA0/2-22 Games
Fire 100/2-22 Games
PlentyChess 6.0.5 JA0/2-22 Games
Halogen 130/2-22 Games
Razer 0.0 JA0/2-22 Games
Aku 2025.22.5 JA0/2-22 Games
PZChessBot 2.0 JA0/2-22 Games
Critter 1.6a0/1-11 Games





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