Chess engine: Viridithas Author:Cosmo
Rating CEDR=3309
v.9.0.0:
Upgrades:
Square the CReLU activations of the feature transformer (35.8 +/- 11.6) (#19)
Reduce the restrictions on NMP (4.78 +- 3.22) (#20)
Add Counter-Move History (2.91 +- 2.26) (#21)
Staged Capture/Quiet move-generation (6.87 +- 4.89) (#22)
Batch history updates (3.95 +- 4.20) (#24)
Add refutations to staged move-generation (3.02 +- 2.37) (#25)
Train network on a bigger dataset (6.95 +- 4.99) (#26)
Exit the movepicker early on finding a losing move (5.37 +- 4.09) (#29)
More robust NMP (3.46 +- 2.76) (#30)
New time-management design (5.8 +/- 4.1) (#31)
Try move from the TT in quiescence search (7.46 +- 5.12 & 4.35 +- 3.44) (#32 & #33)
Try full-depth nullwindow search before fullwindow search if LMR-ed search beats alpha (29.59 +- 11.26) (#34)
Train NNUE using AdamW instead of Adam (10.16 +- 6.37) (#36)
Add capture history (3.13 +- 2.50) (#39)
Remove dead code in quiescence search (1.41 +- 3.82) (#41, thanks @archishou!)
Add Contempt (#43)
Viridithas now releases binaries with proper hardware levels. The v3 binary is the best for modern systems, while v2 & v1 are largely compatibility binaries. The v4 binaries support avx512 but are as-yet untested as I possess no avx512-compatible hardware. The linux binaries are statically linked to libc (with -C target-feature=+crt-static) so they have a better-than-usual chance of working across systems.
Individual statistics: Viridithas 6.0.0 - 323 games (+ 77,= 82,-164), 36.5 %
Critter 1.6a : 4 (+ 1,= 1,- 2), 37.5 %
Asymptote 0.8 : 1 (+ 1,= 0,- 0), 100.0 %
Devel 4.0.2.3 : 1 (+ 1,= 0,- 0), 100.0 %
Barbarossa 0.6.0 : 1 (+ 1,= 0,- 0), 100.0 %
Hiarcs 15.5 : 2 (+ 0,= 1,- 1), 25.0 %
Supernova 2.4 : 1 (+ 1,= 0,- 0), 100.0 %
Zevra 2.5 : 1 (+ 1,= 0,- 0), 100.0 %
Loki 3.5.0 : 1 (+ 1,= 0,- 0), 100.0 %
Cosette 5.1 : 1 (+ 1,= 0,- 0), 100.0 %
FrankyGo 1.0.3 : 1 (+ 1,= 0,- 0), 100.0 %
Pawn 2021-09-22 : 1 (+ 1,= 0,- 0), 100.0 %
RofChade 3.0 : 8 (+ 0,= 3,- 5), 18.8 %
SlowChess 2.9 : 6 (+ 0,= 3,- 3), 25.0 %
Journeyman 2.1 : 1 (+ 1,= 0,- 0), 100.0 %
Fisherov chess monk 1.2 : 10 (+ 0,= 4,- 6), 20.0 %
Anka 0.6.3 : 1 (+ 1,= 0,- 0), 100.0 %
Popochin 4.3 : 1 (+ 1,= 0,- 0), 100.0 %
FoxSEE 8.2 : 1 (+ 1,= 0,- 0), 100.0 %
Blunder 8.5.5 : 1 (+ 1,= 0,- 0), 100.0 %
Fritz 18 : 2 (+ 0,= 2,- 0), 50.0 %
Ceibo 0.9 : 1 (+ 1,= 0,- 0), 100.0 %
Dumb 1.11 : 1 (+ 1,= 0,- 0), 100.0 %
Revenge 3.0 : 6 (+ 0,= 1,- 5), 8.3 %
Ethereal 13.88 Plus NNUE : 2 (+ 0,= 1,- 1), 25.0 %
Frozenight 5.1.0 : 1 (+ 1,= 0,- 0), 100.0 %
Francesca 0.32 : 1 (+ 1,= 0,- 0), 100.0 %
Halogen 11 : 2 (+ 0,= 1,- 1), 25.0 %
Eman 8.40 : 4 (+ 0,= 1,- 3), 12.5 %
Altair 1.0.0 : 1 (+ 1,= 0,- 0), 100.0 %
Prophet 4.3 : 1 (+ 1,= 0,- 0), 100.0 %
Seer 2.6 : 6 (+ 0,= 2,- 4), 16.7 %
Fornax 4.0 : 1 (+ 1,= 0,- 0), 100.0 %
Stash 34.0 : 2 (+ 0,= 1,- 1), 25.0 %
ShenYu 1.0.1 : 1 (+ 1,= 0,- 0), 100.0 %
Kayra 1.7 : 4 (+ 0,= 0,- 4), 0.0 %
Lynx 0.13.0 : 1 (+ 1,= 0,- 0), 100.0 %
Berserk 20221129 : 6 (+ 0,= 0,- 6), 0.0 %
Caissa 1.4 : 4 (+ 0,= 4,- 0), 50.0 %
Rebel 16 : 4 (+ 0,= 1,- 3), 12.5 %
Stockfish 15.1 : 8 (+ 0,= 2,- 6), 12.5 %
RubiChess 20221203 : 8 (+ 0,= 1,- 7), 6.2 %
Alexandria 3.1.0 : 1 (+ 0,= 1,- 0), 50.0 %
Cdrill 2000 : 4 (+ 4,= 0,- 0), 100.0 %
Clover 3.2.1 : 2 (+ 0,= 1,- 1), 25.0 %
Knightx 3.6a : 6 (+ 5,= 1,- 0), 91.7 %
Avalanche 1.3.1 : 7 (+ 3,= 3,- 1), 64.3 %
Cheese 3.1.1 : 2 (+ 1,= 0,- 1), 50.0 %
Igel 3.2.0 : 2 (+ 1,= 0,- 1), 50.0 %
BlackCore 4.0 : 10 (+ 1,= 6,- 3), 40.0 %
CorChess 201222 : 2 (+ 0,= 1,- 1), 25.0 %
Stockfish 22122106 : 2 (+ 0,= 0,- 2), 0.0 %
Stockfish 201222 Ivec : 2 (+ 0,= 0,- 2), 0.0 %
Eubos 2.17 : 4 (+ 4,= 0,- 0), 100.0 %
Kookaburra 1.03a : 10 (+ 0,= 2,- 8), 10.0 %
Minic 3.32 : 8 (+ 0,= 3,- 5), 18.8 %
Little Goliath 3.16 : 10 (+ 3,= 6,- 1), 60.0 %
Leorik 2.3 : 10 (+ 8,= 2,- 0), 90.0 %
BlackCat 2.3 : 2 (+ 2,= 0,- 0), 100.0 %
Luna 0.2.1 GS : 4 (+ 4,= 0,- 0), 100.0 %
RapChess 2022-12-10 : 2 (+ 2,= 0,- 0), 100.0 %
Charisma NY23 : 4 (+ 0,= 2,- 2), 25.0 %
CorChess 20221220 : 2 (+ 0,= 0,- 2), 0.0 %
Yoda : 4 (+ 0,= 1,- 3), 12.5 %
Stockfish 20221220 : 4 (+ 0,= 1,- 3), 12.5 %
Stockfish 20221221 : 4 (+ 0,= 0,- 4), 0.0 %
Black Cat 2.3 : 2 (+ 2,= 0,- 0), 100.0 %
RukChess 3.0.12 : 4 (+ 1,= 1,- 2), 37.5 %
RukChess 3.0.12 Toga : 2 (+ 1,= 1,- 0), 75.0 %
Dragon 3.2 : 6 (+ 0,= 0,- 6), 0.0 %
Velvet 5.0.0 : 8 (+ 0,= 4,- 4), 25.0 %
Minic 3.33 : 8 (+ 1,= 4,- 3), 37.5 %
Uralochka 3.39d : 6 (+ 0,= 2,- 4), 16.7 %
RukChess 3.0.13 NNUE2 : 1 (+ 0,= 1,- 0), 50.0 %
Seawall 20230105 : 1 (+ 1,= 0,- 0), 100.0 %
Rebel 16.1 : 6 (+ 0,= 1,- 5), 8.3 %
Jangine 2022-12-27 : 1 (+ 1,= 0,- 0), 100.0 %
Mayhem 8.0 : 2 (+ 2,= 0,- 0), 100.0 %
ShashChess 27 : 2 (+ 0,= 0,- 2), 0.0 %
Eman 8.60 : 6 (+ 0,= 1,- 5), 8.3 %
Blue Marlin 15.5 : 2 (+ 0,= 0,- 2), 0.0 %
Blue Marlin 15.6 : 4 (+ 0,= 0,- 4), 0.0 %
BrainLearn 21.1 : 4 (+ 0,= 2,- 2), 25.0 %
Carp 1.1.0 : 1 (+ 1,= 0,- 0), 100.0 %
Akimbo 0.1.1 : 1 (+ 1,= 0,- 0), 100.0 %
BlackCore 5.0 : 1 (+ 1,= 0,- 0), 100.0 %
Stockfish 20230114 : 2 (+ 0,= 0,- 2), 0.0 %
Tofiks 1.0 : 1 (+ 1,= 0,- 0), 100.0 %
MagiC 2.9 : 1 (+ 1,= 0,- 0), 100.0 %
Igel 3.3.0 : 6 (+ 0,= 2,- 4), 16.7 %
Koivisto 9.0 : 6 (+ 0,= 0,- 6), 0.0 %
Polyfish 230115 : 4 (+ 0,= 0,- 4), 0.0 %
Caissa 1.5 : 6 (+ 1,= 3,- 2), 41.7 %
ShashChess 27.2 : 4 (+ 0,= 0,- 4), 0.0 %
BrainLearn 21 : 2 (+ 0,= 0,- 2), 0.0 %
CorChess 20230124 : 2 (+ 0,= 1,- 1), 25.0 %
Stockfish 20230125 : 2 (+ 0,= 0,- 2), 0.0 %
github:https://github.com/cosmobobak/viridithas/releases/tag/v9.0.0
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