World Draughts Forum

Saying goodbye to these formulas I derived years ago to calculate a reasonably compact EGTB index with holes..

#define SUM2(L0) (((99 - L0) * L0) / 2)
#define SUM2M(L0, M) (((2 * M + 1 - L0) * L0) / 2)

#define SUM3(L0) (((7202 - 147 * L0 + L0 * L0) * L0) / 6)
#define SUM32(L0, L1) (((1 + L0 - L1 ...

Version 5.0.1 is now available

It fixes the "missing weights, poor performance" message. In retrospect it may have affected strength in some cases after all.

5.0.1 is much stronger than 5.0. In my internal benchmark the score moved from 42.5% win to 47.2% wins against scan 3.1. A yet to be ...

Hi Michel,

What weights to use please?
I launched et dxp match and so "missing weights, poor performance"

Friendly, Sidiki

Hi Sidiki,

You can ignore the warnings. They are about the old evaluation function, but dragon does not use them any more. I will remove the messages in a new version ...

Hi Michel,

What weights to use please?
I launched et dxp match and so "missing weights, poor performance"

Friendly, Sidiki

You can download version 5.0: https://www.mdgsoftware.nl/draughts/index.html

* New, stronger evaluation function
* fixed bug for thread selection on 14, 18 core machines
* split between for cpu's SSE2 and AVX2 support (avx2) avx2 is +8% faster
* Installer now uses PGO version for +5% speed ...

Hi Michel,

I completely agree with your observations. What you describe is exactly where AI is becoming incredibly powerful: implementation, experimentation, optimization, and iteration at a scale no human can match.
My point was not that AI cannot build a strong engine. Clearly it can, especially ...

Hi Michel,

Thanks again for you come-back and these update.
I still encounter a problem since 4.8's version.
After each move i receive a message saying that version not enough place to show the PV.
Have you an idea please.

Friendly, Sidiki


I fixed it in version 4.8.2, download at https ...

Hi Joost,

I started, to expose my case, coding a fear years ago, 2006. But learned more via this forums and my many personal projects. To sa that i have a good knowledge in C++, just to quote it.

I completely understand your point, and I have a lot of respect for the people who spent years ...

Hi Michel,

Thanks again for you come-back and these update.
I still encounter a problem since 4.8's version.
After each move i receive a message saying that version not enough place to show the PV.
Have you an idea please.

Friendly, Sidiki

Hi all,

This's a very interseting topic.

I think you raise a very interesting point, especially regarding AI-assisted dataset generation. I agree that AI will play an increasingly important role in creating, filtering, and analyzing training data.

That said, I would make a small distinction ...

Hi Bert,

Great match, and nice to see that Damage upgraded to 18.4.
Congratulations.

Friendly, Sidiki

Hi Joost,
It's true, i think that with the player or programme with most pawn at the end of the game must/could be the winner.
Or if someone create another search and eval.

I will be glad to test and a tournament with this version.

Friendly, Sidiki

Hi Joost,

Great, all draws. Ares done well. I plan to run a tournament these day and i will be glad to include this latest version.
Congratulations.

Friendly, Sidiki

Hi Gijsbert,

Thanks for the readme.
We will enjoy.

Please , i want to know if the latest version that played the Krzysztof's tournament is on the server.

Friendly, Sidiki.

2 move-ballots dxp games.

Friendly, Sidiki