New version chess engine: Velvet 7.1.0 NNUE

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Velvet - UCI Chess Engine
Author: Martin Hornet, 
Rating CEDR (Chess Engines Diary Rating)=3575

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.7.1.0
This is just a minor release with some bug-fixes, performance improvements and a small strength increase

Estimated strength increase: ~ 20 Elo

Changes
Search improvements
Performance optimizations
Fixed bugs
UCI option handling: support spaces inside the 'value' part
50-move draw rule logic: checkmate at 100th half-move evaluated as draw
Statistics
Elo change: v7.1.0 compared to v7.0.0 against the same set of opponents
Move range: grouped by games won in less than x moves (each game only belongs to one group, so a game that ended in 57 moves would belong to the group "60", but not "80", "100", etc.)

Velvet 7.0.0 - results:
Stormphrax 4.0.03/4+24 Games
Willow 4.02.5/4+14 Games
Altair 7.0.02.5/4+14 Games
Uralochka 3.41 dev12/4+04 Games
Berserk 12.12/4+04 Games
RofChade 3.12/4+04 Games
Pawn 3.02/4+04 Games
Lizard 10.22/4+04 Games
Ethereal 14.252/4+04 Games
Seer 2.8.01.5/4-14 Games
Obsidian 10.01.5/4-14 Games
Clover 6.11.5/4-14 Games
RubiChess 202401121.5/4-14 Games
Revenge 3.01.5/4-14 Games
Alexandria 6.01.5/4-14 Games
Caissa 1.171/4-24 Games
Deep HIARCS 15.32/2+22 Games
Booot 7.31.5/2+12 Games
Clarity 5.1.01.5/2+12 Games
Tenax 0.9.51.5/2+12 Games
Peacekeeper 2.301.5/2+12 Games


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