Velvet - UCI Chess Engine
Author: Martin Hornet,
Rating CEDR (Chess Engines Diary Rating)=3358
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.5.2.0
This releases comes with a new neural network, search improvements and some fixes
Estimated strength increase: ~ 40 Elo standard chess / 60 Elo FRC
Changes
New neural network trained from v5.1.0 and v5.2.0dev self-play games
Search improvements
Fixed fathom compilation issue for no-popcount Windows build
Improved tablebase probing
Switched transposition table replacement scheme
Make tablebase probes resilient to incomplete TB sets
Individual statistics: 141 Velvet 4.0.1 - 264 games (+102,= 83,- 79), 54.4 %
Critter 1.6a : 2 (+ 2,= 0,- 0), 100.0 %
Fritz 17 : 2 (+ 0,= 2,- 0), 50.0 %
Xiphos 0.6.1 : 10 (+ 4,= 4,- 2), 60.0 %
Lc0 0.29.0-rc0 : 2 (+ 0,= 0,- 2), 0.0 %
Devel 4.0.2.3 : 2 (+ 2,= 0,- 0), 100.0 %
Lozza 2.2 : 2 (+ 2,= 0,- 0), 100.0 %
Komodo 13.02 : 2 (+ 1,= 0,- 1), 50.0 %
Stash 33.0 : 2 (+ 1,= 0,- 1), 50.0 %
RofChade 3.0 : 2 (+ 0,= 2,- 0), 50.0 %
Rebel 15x2 : 2 (+ 0,= 1,- 1), 25.0 %
Colossus 2022a : 4 (+ 4,= 0,- 0), 100.0 %
Fisherov chess monk : 4 (+ 0,= 1,- 3), 12.5 %
Deep Shredder 13 : 12 (+ 5,= 5,- 2), 62.5 %
Fire 8 NN.MC.3 : 2 (+ 0,= 1,- 1), 25.0 %
Marvin 6.0.0 : 2 (+ 0,= 2,- 0), 50.0 %
Knightx 3.3 : 2 (+ 2,= 0,- 0), 100.0 %
Berserk 9 : 6 (+ 0,= 3,- 3), 25.0 %
Fisherov chess monk 1.2 : 2 (+ 0,= 1,- 1), 25.0 %
Winter 0.9 : 10 (+ 6,= 4,- 0), 80.0 %
Gargantua 1.0 : 12 (+ 9,= 3,- 0), 87.5 %
Prophet 4.2 : 2 (+ 2,= 0,- 0), 100.0 %
EMAN 8.10 : 4 (+ 0,= 1,- 3), 12.5 %
ProteusSF RBE 008b : 4 (+ 0,= 1,- 3), 12.5 %
Foxsee 8.2 : 10 (+ 10,= 0,- 0), 100.0 %
Rebel 15.1 : 24 (+ 0,= 14,- 10), 29.2 %
Alexandria 2.3 : 20 (+ 14,= 6,- 0), 85.0 %
Blunder 8.0.0 : 14 (+ 14,= 0,- 0), 100.0 %
Corchess 110722 : 10 (+ 0,= 3,- 7), 15.0 %
Minic 3.24 : 16 (+ 2,= 10,- 4), 43.8 %
Stockfish 110722 Ivec : 12 (+ 0,= 3,- 9), 12.5 %
Belofte 2.1.5 : 2 (+ 2,= 0,- 0), 100.0 %
Cinnamon 2.5 : 4 (+ 3,= 1,- 0), 87.5 %
Frozenight 4.0.0 : 2 (+ 2,= 0,- 0), 100.0 %
Simple Chess 1.0.0 : 1 (+ 1,= 0,- 0), 100.0 %
Uralochka 3.37c : 2 (+ 1,= 1,- 0), 75.0 %
Crystal 4.1 : 2 (+ 0,= 1,- 1), 25.0 %
Stockfish 040722 : 4 (+ 0,= 1,- 3), 12.5 %
Spectral : 2 (+ 0,= 1,- 1), 25.0 %
Bagatur 3.4b : 3 (+ 2,= 1,- 0), 83.3 %
FoxSEE 7.36 : 4 (+ 4,= 0,- 0), 100.0 %
Simple Chess 1.1.0 : 2 (+ 2,= 0,- 0), 100.0 %
CorChess 110722 : 2 (+ 0,= 1,- 1), 25.0 %
Leorik 2.2 : 2 (+ 2,= 0,- 0), 100.0 %
Swordfish 15.3 : 2 (+ 0,= 1,- 1), 25.0 %
Kayra 1.5 : 4 (+ 0,= 0,- 4), 0.0 %
Roc 1.9 : 10 (+ 3,= 7,- 0), 65.0 %
Stockfish 130722 : 4 (+ 0,= 0,- 4), 0.0 %
CorChess 180722 : 4 (+ 0,= 0,- 4), 0.0 %
Dragon 3 by Komodo Chess 64-b : 4 (+ 0,= 1,- 3), 12.5 %
Lc0 0.30.0-dev+git.9533e32 : 4 (+ 0,= 0,- 4), 0.0 %
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