Velvet - UCI Chess Engine, Author: Martin Hornet
Chess Engines Diary Rating CEDR=3589
After a few months, a new version of the powerful chess engine has appeared - Velvet 8.1.0.
The engine is in the TOP-64 CEDR Ranking and in the latest edition of the chess engine league it plays in the 1st League. The first engine tests will be held soon.
v.8.1.0
This minor release comes with some search improvements and a partial switch to 8-bit quantized weights.
Estimated strength increase (using the default network): ~ 40 Elo
40 Elo - 60+0.6s TC against a gauntlet of other engines with unbalanced openings
60 Elo - 60+0.6s TC in self-play against the previous version 8.0.0
Results may vary depending upon time control, opponents and opening selection.
Changes
Switch from 16- to 8-bit quantized weights in the input layer
Several search improvements
Minor time management improvement
Support for AVX-512 (Linux only at the moment)
Changed default value for UCI option RatingAdvAdaptiveStyle from true to false
Update to Rust 1.82.0
Notes
Due to the lack of an ARM-based (Apple Silicon) computer, the "apple-silicon" builds are untested.
Installation
The chess engine is available for Windows and Linux and requires a 64 Bit CPU.
There are optimized executables available for different CPU micro-architecture generations.
Starting with Velvet v4.1.0 there are also builds for macOS provided.
Currently there are no specific optimizations for the ARM-based/Apple Silicon builds implemented, so
the macOS builds for x86_64 might be faster.
If you have a relatively modern CPU (2013+) with AVX2 support, then the ...-x86_64-avx2 executable is highly recommended for best performance.
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