New amateur chess engine Petrel

[Gabor Szots]

And I have forgotten how I hated Windows for a programmer.

If I were a programmer I would probably also hate Windows. But I am not.

[Gabor Szots]

However, this line worked: clang++ *.cpp -std=c++20 -O3 -march=native -oPetrel_2.1-x64.exe

PGO build does not add much speed for my code, but LTO does.

You mean I should add '-flto' to the command line?

[Aleks Peshkov]

However, this line worked: clang++ *.cpp -std=c++20 -O3 -march=native -oPetrel_2.1-x64.exe

PGO build does not add much speed for my code, but LTO does.

You mean I should add '-flto' to the command line?

I suggest it if it works without much extra trouble.

[Gabor Szots]

However, this line worked: clang++ *.cpp -std=c++20 -O3 -march=native -oPetrel_2.1-x64.exe

PGO build does not add much speed for my code, but LTO does.

You mean I should add '-flto' to the command line?

I suggest it if it works without much extra trouble.

Clang does not like it.

Anyway, it seems the hash problem has gone so I'm going to start its test tomorrow.

[Aleks Peshkov]

Anyway, it seems the hash problem has gone so I'm going to start its test tomorrow.

Thank you very much.

[Gabor Szots]

Nevertheless, I suggest you offer Windows exes for download. I am sure all testing groups and most individuals have only Windows machines.

[Aleks Peshkov]

Version 3.0 published. NNUE evaluation.
Expected improvement about 600 Elo from PeSTO version.

https://github.com/AleksPeshkov/petrel/releases/tag/v3.

Still only Linux build from me.

[Aleks Peshkov]

Petrel 3.0 64 JA
Windows/Linux & Android profiled builds

Jim Ablett embedded NN file into application file, I suggest to use his binaries and source code, until I release next "official" version with his improvements.
viewtopic.php?p=985891#p985891

Proton link: https://drive.proton.me/urls/VFMEB4GT0M#cXUU6DE7PfYP
Smash link: https://fromsmash.com/Petrel30-64JA

[Aleks Peshkov]

Urgent notice. Version 3.0 discovered to have a huge bug and it costs ~85 Elo. Hotfix release will be published soon.

[Aleks Peshkov]

Version 3.1 with bug and compatibility fixes.
https://github.com/AleksPeshkov/petrel/ ... s/tag/v3.1

Fixes from 3.0:

* fixed serious evaluation accumulator incremental update bug
* fixed code to use default bullet scale 400 and rebuild NN file for this scale (compatibility fix)