Cheese 3.0

[Patrice Duhamel]

Cheese 3.0 is available here :

http://cheesechess.free.fr/en/download.html

- add Lazy SMP
- add Syzygy tablebases support (maximum 6 mens)
- use Polyglot opening book format
- support PEXT instruction for magic bitboards
- add UCI hashfull and tbhits informations
- use the program main thread for inputs
- change PST tables
- change pawn shield values
- rewrite passed pawns evaluation
- don't prune advanced pawns push
- change LMR parameters
- fix problems in YBWC
- fix bug in KPK endgame
- fix bug with trapped pieces evaluation
- fix problem in SEE
- fix problem with maximum gamephase
- modernize code, from C++03 to C++17
- code refactoring and simplifications
- add unit tests (using GTest)
- release source code

Code: Select all

	Rank Name           Elo    +    - games score oppo. draws 
   1 Cheese-30-64    21    4    4 10000   57%   -21   38% 
   2 Cheese-22-64   -21    4    4 10000   43%    21   38% 

I finally released Cheese source code :

https://gitlab.com/cheesechess/cheese

I know there are a lot of things to improve in my code, and if you have some advices on C++, chess engine programming, or if you find bugs or anything related to this project, please contact me.

I was not able to compile the PEXT version, because I have an old computer (i5 2500k) and it's currently difficult to change it.
Now I can't compile Mac OS version, and I don't know how to cross compile Android and Raspberry PI versions with recent compilers/toolchains.

YBWC is still used by default in this version, but you can use Lazy SMP by changing "SMPMode" option.
I have a 4 cores CPU, and I'm not sure Lazy SMP works as expected, I will appreciate if someone could run some games to compare 2/4/8, maybe 16 threads, between the YBWC and Lazy SMP mode.

Happy Christmas and end of year celebrations.

[Frank Quisinsky]

Hi Patrice,

link (for windows download file) goes to v2.2.

Thank you for your new version!!

Best
Frank

[Patrice Duhamel]

Thanks, I fixed it, you need to reload the page.

[Frank Quisinsky]

Works fine, thank you!

[Roland Chastain]

Hello Patrice!

Cheese 3.0 is available here :

Good news!

I finally released Cheese source code :

https://gitlab.com/cheesechess/cheese

Great! Thank you. Compilation successful here, on Linux Mageia.

Can't wait to put my nose in the code.

Happy Christmas and end of year celebrations.

Merry Christmas to you.

[Guenther]

Cheese 3.0 is available here :

http://cheesechess.free.fr/en/download.html
...

I finally released Cheese source code :

https://gitlab.com/cheesechess/cheese

...

Happy Christmas and end of year celebrations. :)

Thanks for the new release! I have added the SYZ info and the source link to the chronology.
I see also that it is named 'officially' now with 2 digits in the version unlike in the past?

Happy christmas for you too :)

[Patrice Duhamel]

I see also that it is named 'officially' now with 2 digits in the version unlike in the past?

Yes, I don't know if it's better, the idea is to use the 2nd digit for small releases / bugfix.

[bastiball]

Cheese 3.0 is available here :

http://cheesechess.free.fr/en/download.html

- add Lazy SMP
- add Syzygy tablebases support (maximum 6 mens)
- use Polyglot opening book format
- support PEXT instruction for magic bitboards
- add UCI hashfull and tbhits informations
- use the program main thread for inputs
- change PST tables
- change pawn shield values
- rewrite passed pawns evaluation
- don't prune advanced pawns push
- change LMR parameters
- fix problems in YBWC
- fix bug in KPK endgame
- fix bug with trapped pieces evaluation
- fix problem in SEE
- fix problem with maximum gamephase
- modernize code, from C++03 to C++17
- code refactoring and simplifications
- add unit tests (using GTest)
- release source code

Code: Select all

	Rank Name           Elo    +    - games score oppo. draws 
   1 Cheese-30-64    21    4    4 10000   57%   -21   38% 
   2 Cheese-22-64   -21    4    4 10000   43%    21   38% 

I finally released Cheese source code :

https://gitlab.com/cheesechess/cheese

I know there are a lot of things to improve in my code, and if you have some advices on C++, chess engine programming, or if you find bugs or anything related to this project, please contact me.

I was not able to compile the PEXT version, because I have an old computer (i5 2500k) and it's currently difficult to change it.
Now I can't compile Mac OS version, and I don't know how to cross compile Android and Raspberry PI versions with recent compilers/toolchains.

YBWC is still used by default in this version, but you can use Lazy SMP by changing "SMPMode" option.
I have a 4 cores CPU, and I'm not sure Lazy SMP works as expected, I will appreciate if someone could run some games to compare 2/4/8, maybe 16 threads, between the YBWC and Lazy SMP mode.

Happy Christmas and end of year celebrations.

Congrats for the release! Merry Christmas and Happy New Year! Goodluck for the future development!

[Wolfgang]

Merci bien, Patrice!
https://cegt.forumieren.com/t1638-testing-cheese-3-0

[Patrice Duhamel]

I released a new version to fix few problems :
http://cheesechess.free.fr/en/index.html

Code: Select all

- fix SMP mode initialization for more than 64 threads
- fix FRC castling initialization in FEN parsing
- fix best thread choice in Lazy SMP
- fix uninitialized variables in benchmark