Chess engine: Velvet 5.2.1 NNUE
Velvet - UCI Chess Engine
Author: Martin Hornet,
Rating CEDR (Chess Engines Diary Rating)=3429
It is based upon my previous web-based engine Wasabi, which can be played here.
Installation
x86_64-modern - recommended for recent CPUs from 2013 onwards (requires a CPU with support for the BMI1 instruction sets)
x86_64-popcnt - for older 64-Bit CPUs, which support the POPCNT instruction, but not BMI1
x86_64-vintage - for older 64-Bit CPUs, which support neither POPCNT nor BMI1
Installation
x86_64-modern - recommended for recent CPUs from 2013 onwards (requires a CPU with support for the BMI1 instruction sets)
x86_64-popcnt - for older 64-Bit CPUs, which support the POPCNT instruction, but not BMI1
x86_64-vintage - for older 64-Bit CPUs, which support neither POPCNT nor BMI1
v.5.2.1
This is just a small bug-fix release ...
According to my tests, the fix has no or only a minimal Elo impact.
Playing strength should be the same as v5.2.0.
Changes
Fixes a draw by repetition detection bug
Individual statistics: Velvet 5.2.0 - 274 games (+ 96,=114,- 64), 55.8 %
Critter 1.6a : 12 (+ 9,= 3,- 0), 87.5 %
Zahak 10.0 : 2 (+ 1,= 1,- 0), 75.0 %
Tucano 10.00 : 4 (+ 2,= 2,- 0), 75.0 %
Slowchess 2.9 : 6 (+ 1,= 4,- 1), 50.0 %
Journeyman 2.1 : 2 (+ 2,= 0,- 0), 100.0 %
Fisherov chess monk 1.2 : 2 (+ 0,= 0,- 2), 0.0 %
FoxSEE 8.2 : 4 (+ 4,= 0,- 0), 100.0 %
Seer 2.6 : 6 (+ 0,= 2,- 4), 16.7 %
Fornax 4.0 : 2 (+ 2,= 0,- 0), 100.0 %
Stockfish 15.1 : 4 (+ 0,= 2,- 2), 25.0 %
Minic 3.33 : 6 (+ 0,= 6,- 0), 50.0 %
Uralochka 3.39d : 6 (+ 0,= 3,- 3), 25.0 %
Igel 3.4.0 : 6 (+ 0,= 3,- 3), 25.0 %
Koivisto 9.2 : 6 (+ 0,= 3,- 3), 25.0 %
Rebel 16.2 : 10 (+ 0,= 8,- 2), 40.0 %
Berserk 11.1 : 6 (+ 0,= 4,- 2), 33.3 %
BlackCore 6.0 : 6 (+ 1,= 5,- 0), 58.3 %
Booot 7.1 : 6 (+ 0,= 6,- 0), 50.0 %
Wasp 6.50 : 8 (+ 2,= 4,- 2), 50.0 %
Clovis III : 2 (+ 2,= 0,- 0), 100.0 %
Pawn 1.0 : 2 (+ 2,= 0,- 0), 100.0 %
Arasan 23.5 : 6 (+ 0,= 5,- 1), 41.7 %
Knightx 3.7b : 2 (+ 2,= 0,- 0), 100.0 %
Altair 2.0.0 : 2 (+ 2,= 0,- 0), 100.0 %
Jangine 2023-03-31 : 2 (+ 2,= 0,- 0), 100.0 %
MrBob 1.2.0 : 2 (+ 0,= 2,- 0), 50.0 %
RubiChess 20230410 : 2 (+ 0,= 1,- 1), 25.0 %
RubiChess 20230407 : 6 (+ 0,= 3,- 3), 25.0 %
Caissa 1.8 : 8 (+ 1,= 5,- 2), 43.8 %
Queen 4.05 : 2 (+ 2,= 0,- 0), 100.0 %
Stockfish dev-20230503 Ivec : 4 (+ 0,= 0,- 4), 0.0 %
Polaris 1.6.1 : 8 (+ 7,= 1,- 0), 93.8 %
Viridithas 9.0.0 : 14 (+ 2,= 9,- 3), 46.4 %
Midnight 6 : 2 (+ 2,= 0,- 0), 100.0 %
CatroPOLY 1.8 20230506 : 2 (+ 0,= 1,- 1), 25.0 %
Vafra 12.4 Cfish : 6 (+ 0,= 3,- 3), 25.0 %
ShashChess GZ : 4 (+ 0,= 2,- 2), 25.0 %
4ku 3.0 : 2 (+ 1,= 1,- 0), 75.0 %
Ice4 v3 : 2 (+ 2,= 0,- 0), 100.0 %
Kuma 1.1 : 2 (+ 1,= 0,- 1), 50.0 %
Apotheosis 4.0.1 : 2 (+ 1,= 1,- 0), 75.0 %
Fire 5032023 : 2 (+ 0,= 1,- 1), 25.0 %
Eubos 2.20 : 2 (+ 2,= 0,- 0), 100.0 %
Ippolit 051323 : 8 (+ 6,= 2,- 0), 87.5 %
Willow 2.8 : 8 (+ 8,= 0,- 0), 100.0 %
TheBaron 3.45 : 10 (+ 10,= 0,- 0), 100.0 %
Clover 4.1 : 12 (+ 1,= 5,- 6), 29.2 %
Akimbo 0.3.0 : 4 (+ 4,= 0,- 0), 100.0 %
Eubos 2.21 : 2 (+ 2,= 0,- 0), 100.0 %
Fire 5192023 : 6 (+ 1,= 4,- 1), 50.0 %
QuintBot 1.2.0 : 2 (+ 2,= 0,- 0), 100.0 %
StoneChess 2023-05-20 : 2 (+ 2,= 0,- 0), 100.0 %
Fire-zero 5192023 : 2 (+ 0,= 2,- 0), 50.0 %
NIppolit : 2 (+ 1,= 1,- 0), 75.0 %
Fire NN 5162023 : 4 (+ 1,= 3,- 0), 62.5 %
ShashChess 32 : 2 (+ 0,= 0,- 2), 0.0 %
Brainlearn 24 : 2 (+ 0,= 1,- 1), 25.0 %
Polyfish 230510 : 6 (+ 0,= 3,- 3), 25.0 %
Little Beast 2 sl : 2 (+ 0,= 1,- 1), 25.0 %
Drofa 3.3.27 : 4 (+ 3,= 1,- 0), 87.5 %
Raid v1 : 4 (+ 0,= 0,- 4), 0.0 %
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