Stockfish 2.0 Available

[Graham Banks]

Hi Graham,

I guess you meant Joona, not Jouni ...

A big thank you from me too and a healthy year to all of you!

Joerg

Yes, my bad. Sorry Joona.

[Dirt]

- For people compiling themselves, stockfish 2.0 signature is 7224363.
It means that running from command line 'stockfish bench' you should
get at the end 7224363 searched nodes. If this not happens please
report back, it means SF is miscompiled.

Ok, I got 7224363. Looking at the nodes/sec I can't see any difference in node/sec, although both the highest and lowest runs are from the one using POPCNT.

Is there a way to run the same bench in 1.91 and 2.0?

[Joerg Oster]

Hi Jim,

I get this:
Total time (ms) : 9658
Nodes searched : 9105712
Nodes/second : 942815

Is there something wrong with my compile?
This is under Xubuntu 10.10.

[Dirt]

Nodes searched : 9105712

Is there something wrong with my compile?
This is under Xubuntu 10.10.

What command did you use to compile it?

I used "make popcnt-profile-build ARCH=x86-64-modern" or "make profile-build ARCH=x86-64-modern".

[alpha123]

Hi SF Team

It is very dissapointing you have not included GTB support in this NEW YEAR

Edition.

Happy New Year 2011

I'll do that. Hopefully it doesn't end up weaker like last time....

Peter

[mcostalba]

Nodes searched : 9105712

Is there something wrong with my compile?
This is under Xubuntu 10.10.

What command did you use to compile it?

I used "make popcnt-profile-build ARCH=x86-64-modern" or "make profile-build ARCH=x86-64-modern".

It should be ok. After this you run

./stockfish bench

right ?

Could you please post the full compile output together with the command line you use to test it ?

Thanks

[mcostalba]

Is there a way to run the same bench in 1.91 and 2.0?

No is not possible because functionality is different between the 2 versions so that speed comparison is not effective.

Anyhow we have not increased speed from last version so I guess it is ok to see more or less same nodes/sec.

[Ralph Stoesser]

So almost 700 lines of code removed for this release.

SF on Micro-Max course.

Pruning of "useless checks" in qsearch looks interesting. I guess it's not that much gain ELO wise (?). We'll see...

Happy New Year

[Joerg Oster]

Nodes searched : 9105712

Is there something wrong with my compile?
This is under Xubuntu 10.10.

What command did you use to compile it?

I used "make popcnt-profile-build ARCH=x86-64-modern" or "make profile-build ARCH=x86-64-modern".

Well, I used 'make profile-build ARCH=x86-64', since my Quad Q6600 doesn't support popcount. This worked fine with Stockfish 1.9.

[mcostalba]

Nodes searched : 9105712

Is there something wrong with my compile?
This is under Xubuntu 10.10.

What command did you use to compile it?

I used "make popcnt-profile-build ARCH=x86-64-modern" or "make profile-build ARCH=x86-64-modern".

Well, I used 'make profile-build ARCH=x86-64', since my Quad Q6600 doesn't support popcount. This worked fine with Stockfish 1.9.

Please, could you try with a simple:

Code: Select all

make build ARCH=x86-32 COMP=gcc