Chess engine: Pedantic 2.1.0

 

Pedantic - UCI engines Author: JoAnn D. Peeler

Rating Chess Engines Diary CEDR=3123

v.2.1.0:

This release of Pedantic changes the architecture of the NNUE network from (768 -> 128) x 2 -> 1 to (768 -> 384) x 2 -> 1. It was built up in stages from 160, 192, 256 to 384 hidden layers with each step generating new training data for the next net. The final net was trained with 1.9 billion positions. Additionally, the inference was changed from using CReLu to SCReLu activation. Although in my last release I stated that I would endeavor to add HCE back into the engine, I have decided to abandon this as I will probably be ramping down my chess programming activities over the next several months.

Playing strength improvements:

AMD Ryzen 9 7945hx ♦ 256mb Hash Table ♦ 3-6 Man Syzygy ♦ Concurrency 24 ♦ 8moves_v3.pgn

+119.0 +/- 6.9 Elo over Pedantic 2.0.0 in self-play at 20+0.2 time controls.

+92.0 +/- 10.2 Elo over Pedantic 2.0.0 in self-play at 2:00+1 time controls.

+61.8 +/- 14.5 Elo over Pedantic 2.0.0 in self-play at 12:00+8 time controls.

20+0.2 Self-Play Results

Score of Pedantic 2.1.0 vs Pedantic 2.0.0: 1826 - 342 - 2332 [0.665] 4500

... Pedantic 2.1.0 playing White: 1031 - 123 - 1096 [0.702] 2250

... Pedantic 2.1.0 playing Black: 795 - 219 - 1236 [0.628] 2250

... White vs Black: 1250 - 918 - 2332 [0.537] 4500

Elo difference: 119.0 +/- 6.9, LOS: 100.0 %, DrawRatio: 51.8 %

SPRT: llr 0 (0.0%), lbound -inf, ubound inf

120+1 Self-Play Results

Score of Pedantic 2.1.0 vs Pedantic 2.0.0: 464 - 76 - 960 [0.629] 1500

... Pedantic 2.1.0 playing White: 278 - 30 - 442 [0.665] 750

... Pedantic 2.1.0 playing Black: 186 - 46 - 518 [0.593] 750

... White vs Black: 324 - 216 - 960 [0.536] 1500

Elo difference: 92.0 +/- 10.2, LOS: 100.0 %, DrawRatio: 64.0 %

SPRT: llr 0 (0.0%), lbound -inf, ubound inf

12:00+8 Self-Play Results

Score of Pedantic 2.1.0 vs Pedantic 2.0.0: 105 - 17 - 378 [0.588] 500

... Pedantic 2.1.0 playing White: 61 - 7 - 182 [0.608] 250

... Pedantic 2.1.0 playing Black: 44 - 10 - 196 [0.568] 250

... White vs Black: 71 - 51 - 378 [0.520] 500

Elo difference: 61.8 +/- 14.5, LOS: 100.0 %, DrawRatio: 75.6 %

SPRT: llr 0 (0.0%), lbound -inf, ubound inf

Pedantic 2.0.0 - results:

Opponent	Score	+-	Games
RubiChess 20240817	4.5/16	-7	16 Games
Protej 0.6.7	13/13	+13	13 Games
Sloth 2.0	10/10	+10	10 Games
Simbelmyne 1.10.0	6/10	+2	10 Games
Molybdenum 4.0	4.5/10	-1	10 Games
Critter 1.6a	4/10	-2	10 Games
Mufasa 0.2.1 JA	9/9	+9	9 Games
Euwe 1.2.1	6/6	+6	6 Games
DeepBlunder 1.2.0	6/6	+6	6 Games
HypnoS legacy 180824	1.5/6	-3	6 Games
YuliGM STRONG 180824	1.5/6	-3	6 Games
Stockfish 20240820	1/6	-4	6 Games
Rems 150824	1/6	-4	6 Games
Steel Fighter III	1/6	-4	6 Games
Lc0 0.31.1	0.5/6	-5	6 Games
Pioneer 0.3.2	4/4	+4	4 Games

Pedantic 2.1.0 download