DON Chess Engine

Discussion of anything and everything relating to chess playing software and machines.

Moderator: Ras

Chacal X
Posts: 117
Joined: Mon Mar 10, 2025 9:06 pm
Full name: flavio thomazini

Re: DON Chess Engine

Post by Chacal X »

erashid wrote: Tue Jan 06, 2026 5:53 pm
Chacal X wrote: Tue Jan 06, 2026 4:59 pm I don't understand, you've already posted the same links twice, I haven't seen any changes...
It was a bug related to polyglot book.. user reported on Linux i Fixed it in 5min.

but you never report.. how i solve your problem?

Thanks
You didn't solve it, it keeps crashing after 4 or 5 games played, I've already given up on this engine.
Thank you...
erashid
Posts: 175
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Hello,

Has any one tried Polyglot book bug fix patch.

I recently updated.

Thanks
erashid
Posts: 175
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Please check out the latest build of DON here:
I uploaded to 3 servers.

1. mediafire
https://www.mediafire.com/folder/06ewg9vo8mfuj/DON

2. mega
https://mega.nz/folder/Cc1zkbAR#bnycmCX38aGjK6YavnMWqw

3. pixeldrain
https://pixeldrain.com/l/dWZSiJZ8

Changes in this build:
1. Compressed version supported for BMI2 + Higher.
2. Increased performance.
3. Small cleanup.


Please tell me if you want other builds also.
I uploaded the following ARCH for windows.

1. DON-SSE4.1
2. DON-AVX2
3-. DON-BMI2
3*. DON-BMI2-COMP
4-. DON-AVXVNNI
4*. DON-AVXVNNI-COMP
5-. DON-AVX512
5*. DON-AVX512-COMP

*NOTE: *COMP = Compressed version
- ~50% lower memory usage, typically 1–2% faster.
- Recommended for long gameplay and analysis.

Thanks
Ehsan Rashid
erashid
Posts: 175
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Polyglot book also fixed for all platforms.

Also added faster output and pv generation.

Thanks
erashid
Posts: 175
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

DON Chess Engine

Post by erashid »

Polyglot book bug fixed on Linux system.

Please check out the latest build of DON here:
I uploaded to 3 servers.

1. mediafire
https://www.mediafire.com/folder/06ewg9vo8mfuj/DON

2. mega
https://mega.nz/folder/Cc1zkbAR#bnycmCX38aGjK6YavnMWqw

3. pixeldrain
https://pixeldrain.com/l/dWZSiJZ8

Changes in this build:
1. Compressed version supported for BMI2 + Higher.
2. Increased performance.
3. Small cleanup.


Please tell me if you want other builds also.
I uploaded the following ARCH for windows.

1. DON-SSE4.1
2. DON-AVX2
3-. DON-BMI2
3*. DON-BMI2-COMP
4-. DON-AVXVNNI
4*. DON-AVXVNNI-COMP
5-. DON-AVX512
5*. DON-AVX512-COMP

*NOTE: *COMP = Compressed version
- ~50% lower memory usage, typically 1–2% faster.
- Recommended for long gameplay and analysis.

Thanks
Ehsan Rashid
erashid
Posts: 175
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

DON has these 4 options for book:

option name OwnBook type check default false
option name BookFile type string default <empty>
option name BookProbeDepth type spin default 100 min 1 max 256
option name BookPickBest type check default true

The last one:
option name BookPickBest type check default true

set it to false if you want random moves but still closer to best move.
set it to true if you want always best move.

Thanks
erashid
Posts: 175
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Github link for DON.

https://github.com/ehsanrashid/DON

if you want to custom compile for your system.

Thanks
erashid
Posts: 175
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Chacal X wrote: Mon Jan 05, 2026 9:32 pm
Chacal X wrote: Mon Jan 05, 2026 9:17 pm The first two were perfect, let's see the next ones...fingers crossed!
Flavio/
Third game, fourteenth move, it froze! I give up, let's pretend this engine never existed, unless you ask Jim to compile it for you, maybe his technique will yield better results.

Good luck!
Are you still facing Issue with SSE4.1 build?

or problem solved ?

Thanks
chessica
Posts: 1018
Joined: Thu Aug 11, 2022 11:30 pm
Full name: Esmeralda Pinto

Re: DON Chess Engine

Post by chessica »

All builds are faulty and don't work for me, except for ssse3.
Chacal X
Posts: 117
Joined: Mon Mar 10, 2025 9:06 pm
Full name: flavio thomazini

Re: DON Chess Engine

Post by Chacal X »

erashid wrote: Wed Jan 07, 2026 4:41 pm
Chacal X wrote: Mon Jan 05, 2026 9:32 pm
Chacal X wrote: Mon Jan 05, 2026 9:17 pm The first two were perfect, let's see the next ones...fingers crossed!
Flavio/
Third game, fourteenth move, it froze! I give up, let's pretend this engine never existed, unless you ask Jim to compile it for you, maybe his technique will yield better results.

Good luck!
Are you still facing Issue with SSE4.1 build?

or problem solved ?

Thanks
It hasn't been resolved; the program crashes after 4 to 5 games played. Wouldn't it be possible to compile it in AVX (not AVX2), only AVX? This problem occurred with Playntchess and was resolved by compiling it in AVX.