Lozza 2.0

[op12no2]

I thought I was done with chess programming, but I made the mistake of glancing at TalkChess a few months ago and the posts of a person with seemingly boundless energy and enthusiasm called Maksim Korz kickstarted me again; damn you Maksim - now I'm addicted again

Lozza 2.0 is pretty much unchanged except that material, PSTs and all evaluation params were tuned in one go using Peter O's 'Texel' method. The tuning code is in the repo if any other Javascript developers are interested. It's 'the' +1/-1 slow algorithm, but I was not in a rush and It ran for weeks!

At 60+1 that seems to give +150 elo ish on the previous version. testing results here: https://github.com/op12no2/lozza/blob/m ... esting.log

Repo and download here: https://github.com/op12no2/lozza (you'll also need node.js installed to play in Winboard etc.)

Play online in your browser here: https://op12no2.github.io/lozza-ui (mobile friendly - there are also analysis, console and mate-in-1 UIs)

Now to figure out what all this NNUE noise is about...

[Gabor Szots]

That's it! Addiction is spreading! Thank you Colin. Next one to test for me.

[op12no2]

That's it! Addiction is spreading! Thank you Colin. Next one to test for me.

Thanks Gabor; appreciated.

[Graham Banks]

Thanks, Colin. How do I download it?

[op12no2]

Thanks, Colin. How do I download it?

Hi Graham, long time no speak.

In the repo you can click on the green "code" button to download everything (it's not very big) - unzip and grab lozza.js.

Or click on lozza.js in the repo (link below) and copy-paste into a local file of the same name.

https://github.com/op12no2/lozza/blob/master/lozza.js

I've never figured out how to download a single file from a github repo. Anybody?

[Graham Banks]

Got it. Thanks again.

[tomitank]

Thanks, Colin. How do I download it?

Hi Graham, long time no speak.

In the repo you can click on the green "code" button to download everything (it's not very big) - unzip and grab lozza.js.

Or click on lozza.js in the repo (link below) and copy-paste into a local file of the same name.

https://github.com/op12no2/lozza/blob/master/lozza.js

I've never figured out how to download a single file from a github repo. Anybody?

Hi Colin!

Good job!

download:
https://raw.githubusercontent.com/op12n ... r/lozza.js
and (CTRL + S)

[op12no2]

Hi Colin!
Good job!

Cheers Tamás; tuning was pretty interesting. But if I had known about NNUE when I started maybe I would have skipped it

download: https://raw.githubusercontent.com/op12n ... r/lozza.js
and (CTRL + S)

Ah I see, thanks

[tomitank]

Cheers Tamás; tuning was pretty interesting. But if I had known about NNUE when I started maybe I would have skipped it

I haven't dropped the old tuned evaluation yet.
Maybe I won't. Even so, my Neural Network works.
Unfortunately, I have little time to experiment further now.

[op12no2]

I haven't dropped the old tuned evaluation yet.
Maybe I won't. Even so, my Neural Network works.
Unfortunately, I have little time to experiment further now.

I was surprised what tuning gave in self play; but whether or not it translates to gains against other engines and longer time controls; only time will tell.

Yeah, while I was catching up I noticed that you have other commitments now - and also that your progress on Tomitank over the last few years has been very impressive. So much so that I didn't even consider testing against it