Prune 4.0.0 - new version chess engine

Prune - UCI chess engine

Author: Thomas Girolami

Prune 4.0.0 what's new?

Finally a new version !

this one finally has dfrc support (with ~5% of dfrc data in the net)

it also has a new net architecture, with :

threat inputs

input buckets

multi-layer

resulting in a 32.4MB net, sorry testers

there now are 100M standard games + 5M dfrc games in the dataset

the in-engine spsa also got fixed, resulting in a 6 LTC elo gain

this version also support tbs

in term of search patches, there aren't a lot of them, just a fixed material scaling, finally has multi-cut, follow-up history, see pruning...

there is also quite a lot of refactoring, including that it now has a 16-bit move, and now does copy/make instead make/unmake

all those changes translate in a lot of elo gained :

STC :

Results of prunedev vs prunev3.2.1 (10+0.1, 1t, 16MB, UHO_Lichess_4852_v1.epd):

Elo: 160.60 +/- 3.40, nElo: 260.97 +/- 4.82

LOS: 100.00 %, DrawRatio: 24.39 %, PairsRatio: 13.80

Games: 20000, Wins: 10670, Losses: 2032, Draws: 7298, Points: 14319.0 (71.59 %)

Ptnml(0-2): [36, 475, 2439, 4915, 2135], WL/DD Ratio: 1.56

LTC:

Results of prunedev vs prunev3.2.1 (60+0.6, 1t, 128MB, UHO_Lichess_4852_v1.epd):

Elo: 159.83 +/- 2.82, nElo: 313.00 +/- 4.82

LOS: 100.00 %, DrawRatio: 22.33 %, PairsRatio: 27.56

Games: 20000, Wins: 10064, Losses: 1462, Draws: 8474, Points: 14301.0 (71.50 %)

Ptnml(0-2): [9, 263, 2233, 6107, 1388], WL/DD Ratio: 1.12

Estimated CCRL Blitz rating : 3645

Prune 2.0.1 vs other engines:

Eubos 4.2 JA	2/2	+2	2 Games
Colossus 2025b	1/2	+0	2 Games
Bread Engine 2.0.0	0.5/2	-1	2 Games
Qapla 0.3.2	0.5/2	-1	2 Games
Reyna 1.0	0.5/2	-1	2 Games
Tcheran v6.0	0.5/2	-1	2 Games
c4ke v1.0	0.5/2	-1	2 Games
PZChessBot 5.0	0/2	-2	2 Games
Publius 1.0 slow	0/2	-2	2 Games
Arcanum 2.7	0/2	-2	2 Games
Bitbit 1.6	0/2	-2	2 Games
Minke 3.0.0	0/2	-2	2 Games
Cwtch 3	0/2	-2	2 Games
Critter 1.6a 64-bit	0/2	-2	2 Games

 

Prune 4.0.0 - download