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Chess engine: Bagatur 3.7

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Bagatur - UCI chess engines,  Rating CEDR= 3167
Author: Krasimir I. Topchiyski  

v.3.7
  • SMP version:
  • On https://tcec-chess.com/ S24, there is still NPS sclaing issue, because the achieved value is 5-10M nps and the expected is 30M nps.
  • The issue is reproducable on CentOS Stream release 8 and Java OpenJDK 1.8.0.
  • The tests show that with up to 64 cores (128 logical porcessors) it still achieves more stable and deeper depth, for a fixed time, with only 1 Transposition Table, although the NPS is between 3 and 6 times smaller.
  • A new UCI option is introduced for SMP version - CountTranspositionTables.
  • On CentOS Stream release 8 and Java OpenJDK 1.8.0, with 8 Transposition Tables the SMP search achieves similar depth and time, so there is sense to set it not to be 1, only when there is a NPS sclaing issue. In such cases it could be set up to SQRT(THREADS_COUNT) Transposition Tables.
  • More details about the tests of the SMP version, could be found here: https://github.com/bagaturchess/Bagatur/tree/master/Sources/Search#readme
  • Bug fixing and optimizations inside the bagaturchess.search.impl.rootsearch.parallel.SearchersInfo class.
  • SMP version: Code clean up and simplification
  • Single Core version
  • Randomize the non-attacking moves, before moves' ordering and sorting, in order to benefit from the search's undeterminism and minimize error.

Individual statistics: Bagatur 3.3 - 396 games CEDR (+ 92,=117,-187), 38.0 %
Critter 1.6a                  :   2 (+  0,=  1,-  1), 25.0 %
Houdini 1.5a                  :   2 (+  0,=  0,-  2),  0.0 %
Baron 3.44.1                  :   2 (+  0,=  0,-  2),  0.0 %
Ruydos 1.1.11                 :   2 (+  0,=  0,-  2),  0.0 %
Delocto 0.61n                 :   2 (+  0,=  1,-  1), 25.0 %
Betsabe II 1.96               :   4 (+  1,=  0,-  3), 25.0 %
Fridolin 3.10                 :   2 (+  0,=  1,-  1), 25.0 %
Caligula 0.9g                 :   4 (+  2,=  0,-  2), 50.0 %
Fritz 17                      :   2 (+  0,=  2,-  0), 50.0 %
N2 0.4                        :   2 (+  0,=  2,-  0), 50.0 %
Asymptote 0.8                 :   6 (+  1,=  0,-  5), 16.7 %
Stockfish 15                  :   2 (+  0,=  0,-  2),  0.0 %
Fisherov 0.98k                :   4 (+  0,=  1,-  3), 12.5 %
Lc0 0.29.0-rc0                :   2 (+  0,=  0,-  2),  0.0 %
Devel 4.0.2.3                 :   6 (+  0,=  2,-  4), 16.7 %
Cheese 3.0.1                  :   2 (+  0,=  0,-  2),  0.0 %
Pigeon 1.5.1 fix              :   2 (+  2,=  0,-  0), 100.0 %
Lozza 2.2                     :   2 (+  0,=  0,-  2),  0.0 %
Wasp 5.50                     :   4 (+  0,=  0,-  4),  0.0 %
Komodo 13.02                  :   6 (+  0,=  3,-  3), 25.0 %
Arasan 23.3                   :   2 (+  0,=  2,-  0), 50.0 %
Barbarossa 0.6.0              :   4 (+  2,=  1,-  1), 62.5 %
Hiarcs 15.5                   :   4 (+  0,=  2,-  2), 25.0 %
Caligula 1.0b                 :  10 (+  4,=  6,-  0), 70.0 %
Lynx 0.10.0                   :   4 (+  4,=  0,-  0), 100.0 %
OliThink 5.10.1               :   2 (+  0,=  0,-  2),  0.0 %
Mantissa 3.3.0                :   2 (+  0,=  0,-  2),  0.0 %
K2 0.99                       :   2 (+  1,=  1,-  0), 75.0 %
CT800 1.43                    :   4 (+  2,=  1,-  1), 62.5 %
Rodent NNUE 1.0               :   6 (+  3,=  2,-  1), 66.7 %
Loki 3.5.0                    :   2 (+  1,=  1,-  0), 75.0 %
Stash 33.0                    :   6 (+  0,=  3,-  3), 25.0 %
Avalanche 0.3a                :   2 (+  0,=  2,-  0), 50.0 %
ChessKISS 1.8                 :   6 (+  6,=  0,-  0), 100.0 %
Cinnamon 2.4                  :   4 (+  2,=  0,-  2), 50.0 %
Gunborg 1.65                  :   4 (+  4,=  0,-  0), 100.0 %
RofChade 3.0                  :   2 (+  0,=  1,-  1), 25.0 %
Rebel 15x2                    :   8 (+  0,=  6,-  2), 37.5 %
StockfishMZ 170522            :   2 (+  0,=  0,-  2),  0.0 %
Nalwald 15                    :   4 (+  0,=  0,-  4),  0.0 %
Coiled 1.1                    :   2 (+  0,=  0,-  2),  0.0 %
Devre 2.0                     :   2 (+  0,=  0,-  2),  0.0 %
Dumb 1.9                      :   2 (+  0,=  0,-  2),  0.0 %
Benjamin 1.1                  :   2 (+  0,=  0,-  2),  0.0 %
Colossus 2022a                :  14 (+  8,=  6,-  0), 78.6 %
Smallbrain 1.2                :   2 (+  2,=  0,-  0), 100.0 %
CorChess 290522               :   4 (+  0,=  0,-  4),  0.0 %
Fisherov chess monk 1.1       :   6 (+  0,=  1,-  5),  8.3 %
Stockfish 290522 Ivec         :   4 (+  0,=  2,-  2), 25.0 %
Eggnog 3.0                    :   2 (+  0,=  2,-  0), 50.0 %
Vafra 3.3.2                   :   8 (+  1,=  3,-  4), 31.2 %
Leorik 2.1                    :  14 (+  9,=  5,-  0), 82.1 %
Uralochka 3.35a               :   2 (+  0,=  2,-  0), 50.0 %
Stockfish 290522              :   6 (+  0,=  0,-  6),  0.0 %
Journeyman 1.4                :   2 (+  2,=  0,-  0), 100.0 %
Berserk 9-dev3                :   8 (+  0,=  6,-  2), 37.5 %
Koivisto 8.9                  :   6 (+  0,=  6,-  0), 50.0 %
Fisherov chess monk           :   2 (+  0,=  0,-  2),  0.0 %
Kayra 1.4                     :   4 (+  0,=  2,-  2), 25.0 %
Deep Shredder 13              :   2 (+  0,=  1,-  1), 25.0 %
Fritz 15                      :   8 (+  0,=  0,-  8),  0.0 %
Fat Titz 110122 64 BMI2 NUMA  :   2 (+  0,=  2,-  0), 50.0 %
Igel 3.1.0                    :  20 (+  0,=  8,- 12), 20.0 %
Counter 4.1                   :  19 (+  2,=  7,- 10), 28.9 %
Journeyman 1.7                :  14 (+  9,=  2,-  3), 71.4 %
Mayhem 7.3                    :  14 (+  8,=  6,-  0), 78.6 %
Horowitz 2.2                  :  10 (+  6,=  3,-  1), 75.0 %
Uralochka 3.36c               :  10 (+  0,=  2,-  8), 10.0 %
Amoeba 3.4                    :   4 (+  0,=  0,-  4),  0.0 %
DanaSah 9.0                   :   4 (+  0,=  0,-  4),  0.0 %
Combusken 2.0.0               :   6 (+  0,=  2,-  4), 16.7 %
Chareth_010-64                :   4 (+  4,=  0,-  0), 100.0 %
MrBob 1.1.0                   :   2 (+  0,=  1,-  1), 25.0 %
Slowchess 2.9                 :   2 (+  0,=  0,-  2),  0.0 %
Minic 3.22                    :   2 (+  0,=  0,-  2),  0.0 %
Blue Marlin 15.2a             :   4 (+  0,=  1,-  3), 12.5 %
Eubos 2.12                    :   2 (+  2,=  0,-  0), 100.0 %
Journeyman 2.0                :   2 (+  1,=  1,-  0), 75.0 %
Koivisto 8.13                 :   4 (+  0,=  0,-  4),  0.0 %
Marvin 6.0.0                  :   4 (+  0,=  0,-  4),  0.0 %
Vafra 12 Cfish                :   2 (+  0,=  1,-  1), 25.0 %
Protej 0.6.3                  :   3 (+  1,=  1,-  1), 50.0 %
Stockfish 070622              :   4 (+  0,=  0,-  4),  0.0 %
Knightx 3.3                   :   4 (+  2,=  2,-  0), 75.0 %
CorChess 080622               :   2 (+  0,=  0,-  2),  0.0 %
Crystal 060622                :   2 (+  0,=  0,-  2),  0.0 %
EMAN 8.03                     :   2 (+  0,=  0,-  2),  0.0 %
Anka 0.6.3                    :   2 (+  0,=  1,-  1), 25.0 %
Francesca 0.31a               :   2 (+  0,=  0,-  2),  0.0 %
NiCim 3.4.1                   :   2 (+  0,=  0,-  2),  0.0 %
Bagatur 3.7 download 
github:https://github.com/bagaturchess/Bagatur/releases/tag/v3.7

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