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Lunar 0.3.0 - new version chess engine


Lunar - UCI chess engine
Author: Patrick Hilhorst

Lunar 0.3.0 - what's new in this version?

Lunar 0.3.0 represents a significant increase in playing strength due to:

Various search techniques, including but not limited to
Singular extensions
History pruning
Capture history
SEE pruning
Mate threat extensions
Retrained net with more data
SPSA tuning
Various bugfixes

Lunar 0.3.0 - Playing strength?

+165 STC UHO vs Lunar 0.2.1
Elo   | 164.96 +- 8.03 (95%)
Conf  | 8.0+0.08s Threads=1 Hash=64MB
Games | N: 4004 W: 2176 L: 406 D: 1422
Penta | [12, 91, 490, 933, 476]

+149 STC balanced vs Lunar 0.2.1
Elo   | 149.03 +- 7.98 (95%)
Conf  | 8.0+0.08s Threads=1 Hash=64MB
Games | N: 4008 W: 1941 L: 320 D: 1747
Penta | [10, 128, 540, 883, 443]

+187 LTC UHO vs Lunar 0.2.1
Elo   | 186.93 +- 10.27 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=128MB
Games | N: 2000 W: 1110 L: 127 D: 763
Penta | [0, 17, 211, 544, 228]

+176 LTC balanced vs Lunar 0.2.1
Elo   | 175.66 +- 10.25 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=128MB
Games | N: 2000 W: 987 L: 54 D: 959
Penta | [0, 13, 266, 496, 225]

-55 LTC UHO vs Stash 37.0
Elo   | -54.65 +- 10.68 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=128MB
Games | N: 2000 W: 501 L: 813 D: 686
Penta | [110, 307, 398, 155, 30]

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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