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 Stockfish 2.1 (updated 05-05-11)

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PostSubject: Stockfish 2.1 (updated 05-05-11)   Thu May 05, 2011 3:24 am



Quote:
This is Stockfish 2.1.

Diff stats from 2.0.1 says: 54 files changed, 4138 insertions(+), 5656 deletions(-)

So more then 1500 lines of code removed for this release.

In this release a new skill level facility has been introduced. Stockfish can be set to skill level 20 (default) to play at maximum strength or, through setting “Skill Level” UCI option, can be lowered until 0 when should be beatable even by weak players. Implementation of skill levels has been developed around an idea from Heinz van Saanen and is time control and CPU speed independent: you can set skill level at 4 and SF will play with the same strength both on a cell phone at 1’ per game or on a super QUAD machine at 120’+30” TC.

Also of note, “seldepth” UCI info is now correctly implemented and maximum number of threads has been raised from 16 to 32.

For people compiling themselves, stockfish 2.1 signature is 6487630. It means that running from command line ‘stockfish bench’ you should get at the end 6487630 searched nodes. If this not happens please report back, it means SF is miscompiled.

We would like to thank Heinz, Onno, Justin, BB+ and Fruity for their contributions in ideas and useful suggestions, and of course, a big thank you to Jim for its usual kind help.

Have fun.

Stockfish Team
Stockfish 2.1 JA
(updated 05-05-11)

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http://good.net/_nd4gJuJ5y
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PostSubject: Re: Stockfish 2.1 (updated 05-05-11)   Thu May 12, 2011 7:04 pm

Many thanks, a very great engine, but at this time no OSX version.
Strange, because linux is up.

Regards
TheropodeS
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Stockfish 2.1 (updated 05-05-11)
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