Chess engine: Peacekeeper 2.40

Peacekeeper - UCI engine

Author: Kyle Zhang  Rating CEDR=3482

v.2.40:

EDIT: Binaries added (I suck at releasing)

This release features the usual improved NNUE and search. The NNUE network is now trained on an updated and enlarged 1.88B dataset of DFRC selfplay positions and now uses six king buckets. There are also many search patches.

In standard chess, this release is 40 elo stronger in selfplay, and 61 elo stronger in a gauntlet against other opponents of similar strength.

Elo   | 39.78 +- 15.91 (95%)

Conf  | 5.0+0.05s Threads=1 Hash=8MB

Games | N: 1000 W: 327 L: 213 D: 460

Penta | [11, 75, 225, 167, 22]

In DFRC, this release is 61 elo stronger in selfplay.

Elo   | 60.59 +- 16.01 (95%)

Conf  | 5.0+0.05s Threads=1 Hash=8MB

Games | N: 1002 W: 359 L: 186 D: 457

Penta | [13, 73, 195, 168, 52]

Based on the strength gains, v2.40 should have a blitz elo of about 3560, LTC elo of about 3460, and FRC elo of about 3780 (on CCRL scales).

A note on executables: Different executables for windows have been compiled for different instruction sets. AVX512 is the fastest, followed by AVX2, and POPCNT. Pick the fastest one that doesn't crash on your computer.

Peacekeeper 2.30 - result:

Booot 7.3	8.5/19	-2	19 Games
Alexandria 6.0	6/16	-4	16 Games
Texel 1.11	5.5/14	-3	14 Games
Uralochka 3.41 dev1	5/14	-4	14 Games
Stormphrax 4.0.0	5.5/12	-1	12 Games
Pawn 3.0	4.5/12	-3	12 Games
Seer 2.8.0	4/12	-4	12 Games
Clover 6.1	4/12	-4	12 Games
RofChade 3.1	3/12	-6	12 Games
Obsidian 10.0	2/11	-7	11 Games
Minic 3.41	4.5/10	-1	10 Games
Altair 7.0.0	4/10	-2	10 Games
Arasan 24.1	4/10	-2	10 Games
Lizard 10.2	4/10	-2	10 Games
Caissa 1.17	3.5/10	-3	10 Games
Chess-System-Tal-2	3/10	-4	10 Games
Willow 4.0	3.5/9	-2	9 Games
Tenax 0.9.5	3.5/8	-1	8 Games
Ethereal 14.25	3/8	-2	8 Games
Berserk 12.1	2/8	-4	8 Games
RubiChess 20240112	1.5/8	-5	8 Games

Peacekeeper 2.40 download