DON Chess Engine

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

Moderator: Ras

erashid
Posts: 126
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Airton wrote: Sun Dec 07, 2025 12:27 am :wink: Maybe it would be nice to have a version with fortress recognition
Yes I am working on it.
Soon I will provide a fortress recognition version.

Thanks
erashid
Posts: 126
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

DON chess engine now also supports PGN like moves.

in UCI moves:
position startpos moves e2e4 e7e5 d2d4 g8f6

in PGN moves:
position startpos moves e4 e5 d4 Nf6

and castling "e8g8", "O-O", "o-o" and "0-0" also mean same.

PolyGlot Book is also supported and very fast algorithm.

Thanks
Elorejano
Posts: 132
Joined: Sat Mar 20, 2010 3:31 am

Re: DON Chess Engine

Post by Elorejano »

Thanks for the servers
erashid
Posts: 126
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Elorejano wrote: Tue Dec 09, 2025 3:41 am Thanks for the servers
Check out the latest build here:
I uploaded to 3 servers.

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

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

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

Changes in this build:
1. Improved Evaluation & speed-up.
2. Small cleanup and bug fixes.
3. Increased performance.

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
4. DON-AVXVNNI
5. DON-AVX512

Thanks
erashid
Posts: 126
Joined: Sun Oct 20, 2013 8:40 pm
Full name: Ehsan Rashid

Re: DON Chess Engine

Post by erashid »

Check out the latest build 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. Improved Evaluation & speed-up.
3. Small cleanup.
4. Increased performance.


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
User avatar
mclane
Posts: 18947
Joined: Thu Mar 09, 2006 6:40 pm
Location: US of Europe, germany
Full name: Thorsten Czub

Re: DON Chess Engine

Post by mclane »

The thing that annoys me the most is that Don Dailey called his engine DOCH before he called it Komodo.
It was a very modest name.

Dons
Chess
Engine. = DOCH.

This is the reason I don’t like another DON engine.
There are zillions of names. Why overwrite computerchess-history?
What seems like a fairy tale today may be reality tomorrow.
Here we have a fairy tale of the day after tomorrow....
Jouni
Posts: 3754
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: DON Chess Engine

Post by Jouni »

What is the point of this SF clone? Playing or analysing? Other?
Jouni
schahmatist
Posts: 46
Joined: Sat Mar 12, 2022 3:52 pm
Full name: Ben Krik

Re: DON Chess Engine

Post by schahmatist »

Jouni wrote: Thu Dec 18, 2025 7:30 pm What is the point of this SF clone? Playing or analysing? Other?
+1
The same question. Also, from what I understand this derivative exists for more than 10 years. As I am not a programmer and cannot analyze source code, a question: was it initially cloned from SF long time ago and then started living its own live, or is it constantly "refreshed" from newer SF versions (with some additional twicks). In other words, does newest Don version correspond to SF 17 or it's based on much older SF with many original changes after that which has nothing to do with following SF dev specific patches?
User avatar
RubiChess
Posts: 650
Joined: Fri Mar 30, 2018 7:20 am
Full name: Andreas Matthies

Re: DON Chess Engine

Post by RubiChess »

schahmatist wrote: Fri Dec 19, 2025 8:57 pm
Jouni wrote: Thu Dec 18, 2025 7:30 pm What is the point of this SF clone? Playing or analysing? Other?
+1
The same question. Also, from what I understand this derivative exists for more than 10 years. As I am not a programmer and cannot analyze source code, a question: was it initially cloned from SF long time ago and then started living its own live, or is it constantly "refreshed" from newer SF versions (with some additional twicks). In other words, does newest Don version correspond to SF 17 or it's based on much older SF with many original changes after that which has nothing to do with following SF dev specific patches?
https://github.com/ehsanrashid/DON/pull/122/files

It hides updating to latest Stockfish network in a patch called "Remove promo count".
Nothing more to say.