Prune 4.0.1 - 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

v.4.0.1:

fix :

the hash setting for windows (+the problem with the HCE one)

the net under windows (because prune was permuting the net and writting it using the "r" and "w" file mode, and under windows if he see a \n he will write \r\n)

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 4.0.1 - download