Bagatur 5.2b and 5.2c problems!

[Frank Quisinsky]

Hi there,

I have much trouble with Bagatur engine.

In the last weeks different new versions are available.

1. v5.2
2. v5.2a
3. v5.2b
4. v5.2c

Versions 5.2 / 5.2a runs fine with JAVA I installed on my test system, an Intel i9 10gen (Windows 11 Pro.).

Installed is:
jdk-24_windows-x64_bin.exe (v24.0.1)
jre-8u451-windows-x64
jre-8u451-windows-x86

I got an errorlog and checked with ucidebug under Shredder 12 GUI.
Seems all have to do with minidump 256 OS setting, but the settings is right on my test PC.

Versions 5.2b and 5.2c not runs for me.
Perhaps a mistake by myself?

I checked the readme and github hints.
I found here a bit but I can't not solved the problem with *.ini settings and gave up after 3 hours.

Same for the compiles by Jim Ablett.
Versions 5.2b and 5.2c not runs for me.

I checked also ATI driver setup and settings.
Often minidump errors have to do with the graphic driver.
Nothings helps!

In engine "bin" directory are 2 new files since version 5.2b ...
Sure it has to do with it.

Best
Frank

[tmokonen]

One of the changes for versions 5.2b was

• Provide JNI native libraries for vectorized NNUE evaluation using SIMD (AVX2 and AVX512) under both Linux and Windows

Maybe 5.2b and beyond need AVX512?

[Frank Quisinsky]

Hi Tony,

I have 4 PCs, 2 of this with AVX-512 support.
At the moment I reinstall Windows 11 on all of my PCs. The first two, without AVX-2 support, are ready.
Sure I can check this in the next week on the other 2 PCs.

Never I reinstall my OS, all the time I had no troubles with Windows 7, 10 or later with Windows 11.
Since 4 months I am using a for me _new_ program for OS optimizations. This program make troubles with user profile and one of the OS system files (NTUSER.dat) after a Windows 11 update, comes June 2025. And this on all of my 4 PCs I am using for chess.



Learning phase with 58 years.
I should have more respect for OS settings.

With other words ...
Have beaten myself, should not used such programs, different of secret OS settings are unknown for me.

On the other hand ...
To have all PCs with a fresh configuration is not a bad idea.

Optimization tools are in many cases critical. The secret is to do different of such optimizations without any of special optimization tools. Better is to try this with simple OS settings.



Best
Frank

The Bagatur problem I had before and after I made a fresh OS install.
The intel i9 10th gen comes without AVX-512 support.

[Graham Banks]

Hi Graham,

You can delete VectorEval.dll from the bin directory and try again.

Best regards,
Krasimir

Works after that.

[Frank Quisinsky]

Hi Graham,

so, it was one of the two new *.dll files in Engines "bin" directory for version 5.2b and 5.2c.
My guess was right, I am not to old for computer chess ... I am happy!

It works after I delete one of the two new files (VictorsEval.dll).

Thanks Graham & Krasimir!

Best
Frank

[tmokonen]

I don't have to delete VectorEval.dll to run Bagatur on my laptop, which does support AVX512. If you do have hardware with AVX512 support, leave the DLL file. When I deleted it, NPS decreased by about 20%.

[Werner]

How can I reduse hash to about 512 MB?

[Graham Banks]

How can I reduse hash to about 512 MB?

In the ini file, reduce to 1024. I'm not sure it will accept 512, but you could try.
It does say that it doesn't use that full amount.

[Werner]

Many thanks Graham,
it works fine!