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Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 10:04 am
by cetormenter
A complete rewrite of Nirvana has been done. This brought the engine into the modern age by converting to bitboards. This also allowed me to clean up a lot of the code and will make future improvements even easier. The biggest part of this release is addition of multithreading support. This was done via the lazy smp method described elsewhere on this board.
Some comparisons to other engines/version 1.8
Gauntlet against various engines at 6" + 0.05"
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Senpai 326 37 37 392 82% 56 14%
2 Nirvanachess2.0 134 25 25 656 61% 47 18%
3 SmarThink1.6 46 30 30 390 49% 56 20%
4 Nirvanachess1.8 0 21 21 911 45% 48 18%
5 Arasan17.3 -51 31 31 393 36% 56 18%
6 Fruit -130 33 33 392 26% 56 20%
Direct match up at 60" + 0.05"
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Rank Name Elo + - games score oppo. draws
1 Nirvanachess2.0 198 39 39 275 77% 0 21%
2 Nirvanachess1.8 0 39 39 275 23% 198 21%
Gauntlet at 60" + 0.05"
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Senpai 57 55 55 114 58% 0 25%
2 Nirvanachess2.0 0 31 31 455 69% -156 19%
3 Arasan17.3 -175 59 59 114 26% 0 21%
4 SmarThink -184 61 61 113 26% 0 17%
5 Fruit -323 74 74 114 13% 0 11%
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 10:11 am
by Frank Quisinsky
Hi Thomas,
fantastic.
I will switched in my still running tourney to NirvanaChess 2.0.
Do you saw that NirvanaChess 1.8 have a really big Problem in KingSafty compare to version 1.7. Your version 1.8 lost a lot of games very very fast. That is the reason that version 1.7 is around 10-20 Elo stronger as version 1.8.
Thanks for your new version.
I will delete the 300 games I have for version 1.8 in my FCT1 - 2015 - tourney and will replay the games with version 2.0.
Best
Frank
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 10:23 am
by cetormenter
Yes this is due to the lazy evaluation, which gained the engine a lot of speed at the expense of having a less accurate king safety function. This wasn't an issue in self play but as you saw, and as I later saw, in gauntlet play this is actually a fairly large regression. This has been removed in this version.
As always, thank you very much for your testing. Its very good to see how Nirvana preforms under various conditions and against various opponents.
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 10:27 am
by Frank Quisinsky
Hi Thomas,
nice if you have fun with my work ...
After the still running Equinox 3.30 x64 round Robin (Need around 6.5 days, started in the night) your version 2.0 will replay the games from version 1.8.
An other Problem I have with Tornado 6 in my still running FCT1 - 2015 - tourney. Version 5.0 is clearly stronger.
Tornado development is stopped. I will replaced Tornado 6.0 with DisasterArea and in this case two changes I have to make if I restart this tourney in 6.5 days.
Very interesting in testing NirvanaChess ... I am waiting of your new version, available now after the big work you do in the last months!
Thanks again!
Best
Frank
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 10:40 am
by Graham Banks
cetormenter wrote:A complete rewrite of Nirvana has been done. This brought the engine into the modern age by converting to bitboards. This also allowed me to clean up a lot of the code and will make future improvements even easier. The biggest part of this release is addition of multithreading support. This was done via the lazy smp method described elsewhere on this board.
Some comparisons to other engines/version 1.8
Gauntlet against various engines at 6" + 0.05"
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Senpai 326 37 37 392 82% 56 14%
2 Nirvanachess2.0 134 25 25 656 61% 47 18%
3 SmarThink1.6 46 30 30 390 49% 56 20%
4 Nirvanachess1.8 0 21 21 911 45% 48 18%
5 Arasan17.3 -51 31 31 393 36% 56 18%
6 Fruit -130 33 33 392 26% 56 20%
Direct match up at 60" + 0.05"
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Nirvanachess2.0 198 39 39 275 77% 0 21%
2 Nirvanachess1.8 0 39 39 275 23% 198 21%
Gauntlet at 60" + 0.05"
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Senpai 57 55 55 114 58% 0 25%
2 Nirvanachess2.0 0 31 31 455 69% -156 19%
3 Arasan17.3 -175 59 59 114 26% 0 21%
4 SmarThink -184 61 61 113 26% 0 17%
5 Fruit -323 74 74 114 13% 0 11%
Thanks Thomas.
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 4:54 pm
by Dr.Wael Deeb
Excellent Thomas
So were talking about an improvement of 100-120 Elo comparing to version 1.8
Dr.D
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 7:00 pm
by Wolfgang
problem here: does NOT run on AMD-FX6300 (six core)
no problems on Intel (older C2D, i5-520, i7)
could you provide a compile which runs on AMD too?
would be nice...
same problem as @Gabor: readme says "three" different versions, but rar-file only contains one .exe which is not limited to modern systems but to Intel (seemingly)...
Could anyone with similar (AMD) hardware countercheck? Ray?
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 8:31 pm
by cdani
Works on AMD-FX 8350. Did not try a tournament for the moment.
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 8:45 pm
by cetormenter
Dr.Wael Deeb wrote:Excellent Thomas
So were talking about an improvement of 100-120 Elo comparing to version 1.8
Dr.D
Hopefully! We shall see soon on the rating lists. Just in raw speed there quite a significant gain. Not to mention the bug fixes to the evaluation function.
Gabor Szots wrote:
Thomas, I have found only one exe in the package. Is that 64-bit? It does run on my Q6600, which makes me wonder.
Yes there is only a 64 bit compile but I suppose it doesn't hurt to create a 32 bit compile too.
Wolfgang Battig wrote:
PostPosted: Wed Dec 17, 2014 6:00 pm Post subject: Re: Nirvanachess 2.0 Release
problem here: does NOT run on AMD-FX6300 (six core) Sad
no problems on Intel (older C2D, i5-520, i7)
could you provide a compile which runs on AMD too?
would be nice... Wink
same problem as @Gabor: readme says "three" different versions, but rar-file only contains one .exe which is not limited to modern systems but to Intel (seemingly)...
Could anyone with similar (AMD) hardware countercheck? Ray?
I think the AMD cpu must not have access to the bitscan functions. I have reuploaded this time including both a 64 bit compile without those functions and a 32 bit compile. This does incur a slight speed drop however it is only about 2%. Hopefully this fixes the issue. If not then I am at a loss.
Link:
http://www.mediafire.com/download/i7ohp ... ss_2.0.rar
Re: Nirvanachess 2.0 Release
Posted: Wed Dec 17, 2014 10:21 pm
by Wolfgang
Thanks Thomas!
It seems to be a problem with my AMD-FX only. On another AMD (X2-270) it works, no problem...
The new compile also does not work on the FX, so it really seems to be an issue (configuration?!) with this machine