Stockfish 1.3

[mcostalba]

This is Stockfish 1.3, an UCI engine derived from Glarung 2.1

This version is the result of more then 4 months of development (and 90% of that is testing) and the direct contributions of Joona Kiiski and Tord Romstad.

In particular Joona provided tweaks to evaluation parameters, a new new aspiration window search and improvements to razoring. Tord has been very kind to send the current development of Glaurung so that we have now a new pawn storm evaluation, and a new specialized endgame and also various fixes.

I have contributed mainly with the usual cleanup (to deliver a very simple to read and easy to understund code is my main goal) plus some additional features and optimizations here and there.

At the end the diff statistic with previous 1.2 version says it all

60 files changed, 2866 insertions(+), 3388 deletions(-)


So we are now at 522 lines of code less the 1.2 version and very probably a stronger engine.

A special thank to Jim Ablett that was very kind to provide me with binaries for release candidate, so to do the last internal tests with the "normalized" binaries.


Please Jim, could you be so kind to redo the binaries? There have been some changes from release candidate. Thanks in advance.


Known issues

- As the original Glaurung 2.1, this engine is endian sensitive. Please read the README if you have a PowerPC Mac and you want to compile yourself.


- On 32 bit systems code must be compiled with -fno-strict-aliasing option, both under gcc and Intel C++ compiler, to avoid random crashes due to a pop_1st_bit() optimization. MSVC does not seem to have this problem.


Download

You can download sources from:

http://www.mediafire.com/?nxsmb9xjlrd

Thanks
Marco

[zamar]

Good luck with your new engine, Marco!

It has been great fun for me to investigate and learn from the great works of yours and Tord's!

Hope this beast is strong

[jpqy]

Looks great! want to test it directly when a compile is ready!!

JP.

[Jim Ablett]

Stockfish 1.3 JA by Marco Costalba

Windows x64 (Intel compiler 11) & Win32 (Msvc 8) pgo compiles.

Download:
http://www.mediafire.com/?ynwmnijnnin


Jim.

[mcostalba]

Stockfish 1.3 JA by Marco Costalba

Windows x64 (Intel compiler 11) & Win32 (Msvc 8) pgo compiles.

Download:
http://www.mediafire.com/?ynwmnijnnin


Jim.

Thanks Jim !

And now let's see how this puppy runs!

[Dr.Wael Deeb]

Thanks master Jim
Dr.D

[jpqy]

Eigenmann_Endspiel_Test:

Level: 10 Seconds for all tests!!

Core i7 920 @3.911Ghz with "HT OFF"

Stockfish 1.3
70 of 100 matching moves!!
2/05/2009 20:52:15, Total time: 0:18:14 Rated time: 06:29 = 389 Seconds

Tomorrow i will do more tests..but this score is very good!

JP.

[rhollay]

Does it have it's own book? Glaurung's book.bin doesn't seem to work with Stockfish.

[mcostalba]

Does it have it's own book? Glaurung's book.bin doesn't seem to work with Stockfish.

I have merged a patch from Tord to allow Stockfish to use the same book of Glaurung 1.xx series.

Can you please post the link of the book you are testing on ?

Thanks
Marco

[rhollay]

Does it have it's own book? Glaurung's book.bin doesn't seem to work with Stockfish.

I have merged a patch from Tord to allow Stockfish to use the same book of Glaurung 1.xx series.

Can you please post the link of the book you are testing on ?

Thanks
Marco

Marco, I have tried the books which I downloaded from Tord's site:

http://www.glaurungchess.com/book.zip for Glaurung 1.2.1

and http://www.glaurungchess.com/g2book.zip for Glaurung 2.0

But neither work for me.