Rodent II 0.9.33

[PK]

Available for download at: http://www.pkoziol.cal24.pl/rodent/download.htm

I guess it is 2850 Elo on the CCRL scale again (previous version has dived down to 2812). I worked mainly on endgame performance, stabilizing quiescence search, adding more endgame knowledge and improving middlegame positional play, so that Rodent has a chance of surviving till endgame in a slightly better shape than it used to. Nevertheless, this is still the same messy and aggressive engine that it used to be, so have fun!

Beside that there are new parameters for tweaking personalities (preference for keeping given kind of pieces + possibility of setting opening book from personality file).

Changes include:

- more stable quiescence search
- more endgame knowledge, including unstoppable passers
- limiting check extension
- adding recapture extension in pv nodes
- retuning some eval parameters, including passed pawns values
- half-open files are less valuable if enemy pawn on a file is defended
- queen is less valuable with enemy minor pieces on the board
- minor pieces like to be shielded by a pawn
- internal iterative deepening in pv nodes
- mate distance pruning
- opening book can be defined in personality file (depending on basic.ini settings)
- new stylistic parameters for keeping pieces on board

As a bonus, I have changed Rodent's homepage a bit - hope You like it.

There are some more goodies on GitHub, for example a package of opening books: https://github.com/nescitus/Rodent_II/tree/master/books

Enjoy!

[Graham Banks]

Thanks Pawel.

[Damir]

Thanks Pawel.

[carldaman]

Available for download at: http://www.pkoziol.cal24.pl/rodent/download.htm

I guess it is 2850 Elo on the CCRL scale again (previous version has dived down to 2812). I worked mainly on endgame performance, stabilizing quiescence search, adding more endgame knowledge and improving middlegame positional play, so that Rodent has a chance of surviving till endgame in a slightly better shape than it used to. Nevertheless, this is still the same messy and aggressive engine that it used to be, so have fun!

Beside that there are new parameters for tweaking personalities (preference for keeping given kind of pieces + possibility of setting opening book from personality file).

Changes include:

- more stable quiescence search
- more endgame knowledge, including unstoppable passers
- limiting check extension
- adding recapture extension in pv nodes
- retuning some eval parameters, including passed pawns values
- half-open files are less valuable if enemy pawn on a file is defended
- queen is less valuable with enemy minor pieces on the board
- minor pieces like to be shielded by a pawn
- internal iterative deepening in pv nodes
- mate distance pruning
- opening book can be defined in personality file (depending on basic.ini settings)
- new stylistic parameters for keeping pieces on board

As a bonus, I have changed Rodent's homepage a bit - hope You like it.

There are some more goodies on GitHub, for example a package of opening books: https://github.com/nescitus/Rodent_II/tree/master/books

Enjoy!

Thanks, Pawel!

As Mr. Spock would have said: "Fascinating!"

Regards,
CL

[Frank Quisinsky]

Hi Pawel,

at first:

8500 45-minutes games played with FCT Rating List. Much more as CEGT / CCRL rating systems together. It would be nice to find a link to my site too because I can't see that other rating systems added link to your site, I do it for all tested engines on different positions on my site.

I can see CCRL information with two game examples from my list. Today it's not very important for me but often I can see that the programmers have a lot of fun with my work but never I can see a link to my site. I can life with it because it's not very important for myself but I got often mails that users not understand why they can't find links to my site on programmers selections. So different of the users missed the Information and are very happy if my site later found per random.

At second:

To your new version, thanks again for Rodent ...
Very nice what you do with the personalities and Rodent have indeed a very nice playing style. I like your work a lot.

0.9.33 ...
If I load the engine I can see in UCI Options that Rodent will load rodent.ini.
But I can't see Rodent.ini in subdirectoy of personality files.

OK ...
I switch in basic.ini to ...

SHOW_OPTIONS
PERSONALITY_BOOKS

And can see all the settings as UCI Options under Shredder Classic GUI.

I think rodent.ini (Standard Setting) should be to see in main directoy of Rodent. Or all is a bit confused for Basic.ini

Sure that others will search rodent.ini and can't find it.

HIDE_OPTIONS
PERSONALITY_BOOKS

BTW:
We have a Framework for test settings. That is nice!
But here I missed a list of good settings users find out.

Thanks for your work again and your new site looks good for me.

Best
Frank

[Wolfgang]

CEGT - 40/4 can be followed here:
http://cegt.forumieren.com/t601-testing ... -ii-0-9-33

[PK]

Fair point, Frank. Your efforts are much appreciated and I have just updated webpage to mention them.

[Frank Quisinsky]

Hi Pawel,

thanks ...

Shortly:
For myself not important because the programmers do enough for me, can used all the nice engines.

But for others, looking for Information to that topic. So I got some mails in the last years, users not understand that a hand full programmers only made links to my site. Users can't find the information by myself. Not all of the visitors are looking in TalkChess.

Best for you and thanks again for your new version.
Unfortunatley, I have a full ToDo list at the moment ... but you can be sure ... soon I will test your engine again.

Best
Frank

[BrendanJNorman]

You're KILLING my productivity Pawal!

I have a big todo list this week and I just KNOW that I'll spend 12 hours messing about making Rodent personalities now!

Why do you have to release so often!

Haha Just kidding... I love it!

Looking forward to creating big brothers for Henny and Remy!

Appreciate your work my friend.

Brendan

P.S The new site looks great and thanks for the link!

[MikeB]

Thanks Pawel - latest Mac Version

RodentII

Pseudo Bench

Code: Select all

go depth 20
info depth 20 time 18878 nodes 20748067 nps 1099060 score cp 33 pv e2e4 e7e5 g1f3 g8f6 b1c3 f8b4 f1c4 e8g8 f3e5 d8e7 e5f3 b4c3 d2c3 e7e4 d1e2 e4e2 c4e2 d7d6 c1e3 c8e6 e1g1 b8c6 f3d4 c6d4 c3d4 
info currmove b1c3 currmovenumber 2 
info currmove g1f3 currmovenumber 3 
info currmove d2d4 currmovenumber 4 
info time 19104 nodes 21000000 nps 1099246 
info currmove d2d3 currmovenumber 5 
info currmove c2c4 currmovenumber 6 
info currmove b1a3 currmovenumber 7 
info currmove g1h3 currmovenumber 8 
info currmove e2e3 currmovenumber 9 
info currmove f2f4 currmovenumber 10 
info currmove a2a4 currmovenumber 11 
info currmove h2h4 currmovenumber 12 
info currmove g2g4 currmovenumber 13 
info currmove a2a3 currmovenumber 14 
info currmove g2g3 currmovenumber 15 
info currmove h2h3 currmovenumber 16 
info currmove b2b3 currmovenumber 17 
info currmove f2f3 currmovenumber 18 
info currmove b2b4 currmovenumber 19 
info currmove c2c3 currmovenumber 20 
bestmove e2e4 ponder e7e5