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Chess engine: Velvet 3.0.0


Velvet - UCI Chess Engine
Author: Martin Hornet, Rating CEDR (Chess Engines Diary Rating)=3035

 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

v.3.0.0
Added multi-threaded search
Added new neural network trained using self-play positions and evaluations from Velvet 2.0.0
Reduced neural network size by half: removed color-specific input features
Improved training set generation by increasing the position variety
Optimized neural network evaluation
Replaced null move reduction with null move pruning
Tuned and improved search

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