Chess engine: Peacekeeper 2.00

Peacekeeper - UCI engine

Author: Kyle Zhang  Rating CEDR=3127

v.2.00:

This release consists mainly of the addition of NNUE. Peacekeeper now uses a 768->256x2->1 neural net with CReLU as the activation function, trained on 197M selfplay positions generated from previous nets and the original HCE. Singular extensions have also been added, with a variety of add-ons.

In standard chess, this release is 220 elo stronger in selfplay, and 177 elo stronger in a gauntlet against other opponents of similar strength.

ELO   | 219.87 +- 23.21 (95%)

CONF  | 5.0+0.05s Threads=1 Hash=8MB

GAMES | N: 1000 W: 691 L: 131 D: 178

In DFRC, this release is 512 elo stronger in selfplay.

ELO   | 511.50 +- 52.03 (95%)

CONF  | 5.0+0.05s Threads=1 Hash=8MB

GAMES | N: 1000 W: 936 L: 36 D: 28

Based on the strength gains, v2.00 should have a blitz elo of about 3280, LTC elo of about 3180, and FRC elo of about 3390 (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 rating CEDR progress:

Pl	Engine	Rating	Score	Games	%
884	Peacekeeper 1.71	3127.6	180.50	362	49.86
917	Peacekeeper 1.70	3083.2	141.50	306	46.24
981	Peacekeeper 1.60	3009.7	109.00	200	54.50
1082	Peacekeeper 1.50	2855.9	37.00	107	34.58
1093	Peacekeeper 1.4	2832.9	7.00	34	20.59
1159	Peacekeeper 1.2	2748.3	15.00	94	15.96
1177	Peacekeeper 1.40	2729.7	19.50	76	25.66
1249	Peacekeeper 1.3	2596.2	34.00	129	26.36
1269	Peacekeeper 1.1	2555.8	25.00	98	25.51
1318	Peacekeeper 1.01	2481.3	15.00	64	23.44
1352	Peacekeeper 1.0	2425.2	13.50	110	12.27
1367	Peacekeeper 1.10	2402.4	8.00	32	25.00
1379	Peacekeeper 0.11	2384.8	19.00	104	18.27
1388	Peacekeeper 0.12	2378.3	47.50	246	19.31
1623	Peacekeeper 0.1	1889.2	4.00	33	12.12

Peacekeeper 2.00 download