Nu'chess chess engine

[Philip]

Hi to everyone,

After piecing back together some code i broke and adding some very naif multithreading i finally got my old chess engine to work again.
I have been lurking in this forum for uite a while but never published the engine (uci).
Just came up with the name too. Mildly vulgar pun in my native language but i doubt anyone will get it around here



These binaries are compiled for windows targeting my cpu, basically a skylake on a laptop (popcount / bmi )

Thanks to anyone that is interested in testing it and reporting anything back.
Cheers to everyone in this forum for their ideas, passion and interesting conversations and to those who run the place.

Regards

[Brunetti]

These binaries are compiled for windows targeting my cpu, basically a skylake on a laptop (popcount / bmi )

Hi,

can you provide a non-Skylake compile too, please?

Thanx,
Alex

[Philip]

bear with me, I'm 100% a beginner so i'm not sure if i did it right. this should not try to call popcnt / bmi / sse4 instructions.

If it crashes on your machine i will ask for help on the tech part of the forum.
cheers

[Brunetti]

bear with me, I'm 100% a beginner so i'm not sure if i did it right. this should not try to call popcnt / bmi / sse4 instructions.

Well, it works. I've popcnt, sse and AVX, just not BMI.
When possible, authors publish different compiles to meet different architecture, like 32-bit, 64-nopop, 64-SSE4, 64-BMI, 64-AVX2 and so on. The more the better

Thanx,
Alex

[Gabor Szots]

Hi Filippo,

Thanks for the engine. May I have some questions.

If this is the final release of your engine, then fine. Otherwise a version number (also displayed in the engine id when running from the command line) would make things easier.

About how strong it is by your estimate?

Are you going to publish the sources?

[Brunetti]

About how strong it is by your estimate?

1'+1" rating ~2930.

Alex

[Gabor Szots]

Oh, and hash values are a bit confusing. Default 32 min 1 but no max?

[Philip]

Hi Filippo,

Thanks for the engine. May I have some questions.

If this is the final release of your engine, then fine. Otherwise a version number (also displayed in the engine id when running from the command line) would make things easier.

About how strong it is by your estimate?

Are you going to publish the sources?

Should be in the 2900 elo range single threaded. Couldn't test on more CPU and that s what I would be interested to see.
I will add some version in the cmd line, I hope to keep fooling around with this thing eventually. Thanks for pointing that out.
About the source code, I should clean it out before doing that. It is full of comments to myself, including swearing, functions to print various things pointing to private folders on my HDD and a lot of other weird stuff, funny variables names and so on. I'll do it when I have some time if it can be of any use.
Tbh, with all the excellent code available online I don't know how mine would be of any interest.

...Oh, and hash values are a bit confusing. Default 32 min 1 but no max?

I didn't notice that. Maybe I didn't know what to put in there. The maximum size of hash table depends on how much memory is available on your os, or am I missing something?

Cheers

[Gabor Szots]

Other engines do this:

option name Hash type spin default x min y max z

.

Available memory does not matter. The user shall make sure not to exceed it by setting a suitable hash size.

[Philip]

A quick search on microsoft's site showed me that you can, indeed, query windows for available memory. I fixed that and put in some version number


no popcnt

cheers