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 1.0	2/4	+0	4 Games
Kraken 2025-06-16	2/3	+1	3 Games
Fridolin 4.00 JA	1.5/3	+0	3 Games
Libra-chess 1.0.1	2/2	+2	2 Games
Maelstrom 2.1.0	2/2	+2	2 Games
Aku 2025.6.12 JA	2/2	+2	2 Games
Freda 1.1	2/2	+2	2 Games
Emerald 0.3.0	2/2	+2	2 Games
Celeris 1.0	1.5/2	+1	2 Games
Pzchessbot 2.0	1/2	+0	2 Games
Stormphrax 7.0.0	0.5/2	-1	2 Games
Fire 9.3 JA	0.5/2	-1	2 Games
Zangdar 4.04	0/2	-2	2 Games
Zangdar 4.04 JA	0/2	-2	2 Games
Fire 10	0/2	-2	2 Games
PlentyChess 6.0.5 JA	0/2	-2	2 Games
Halogen 13	0/2	-2	2 Games
Razer 0.0 JA	0/2	-2	2 Games
Aku 2025.22.5 JA	0/2	-2	2 Games
PZChessBot 2.0 JA	0/2	-2	2 Games
Critter 1.6a	0/1	-1	1 Games

Lunar 0.3.0 download