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Up Topic Rybka Support & Discussion / Rybka Support / Deep Rybka 4 x64 -v- SSE42 x64
- - By keevilp (*) [gb] Date 2010-05-30 10:51
I have just bought Rybka 4 and with it came several engines.

The 960 is clearly for that version of the game.

I just wondered what the SSE42 was and whether it was stronger than the normal x64
Parent - - By Athinira (**) [dk] Date 2010-05-30 10:56
It's a special version for the Intel Core i7 family. It evaluates around 5% faster on those systems.

If you don't have an i7, you can't make use of this, and need to use the normal version of Rybka.

SSE - Wikipedia
Parent - - By keevilp (*) [gb] Date 2010-05-30 10:59
Cheers Athiniri

How do I find out whether I am using an i7

I am using a Dell Studio Laptop with Intel Centrino 64bit.
Parent - By Dragon Mist (****) [hr] Date 2010-05-30 11:02
Centrino sounds like it is not i7 or anything newer, so you should not use SSE version of the engine.
Parent - - By pokerpawn (***) [be] Date 2010-05-31 08:28
also on Core I5 750 (i use it) ;)
just run cpu-z to check

http://www.filehippo.com/download_cpuz/
Parent - - By Athinira (**) [dk] Date 2010-05-31 14:12
Woot, that means i can use it as well (my laptop uses an i5 430M, which according to CPU-Z supports SSE4.2)! Off we are to 5% faster speeds we are! ;D
Parent - By pokerpawn (***) [be] Date 2010-05-31 15:29
congratz ! :)
CPU-Z doesn't lie
Parent - - By Gaмßito (****) [cr] Date 2010-05-30 10:58

> I just wondered what the SSE42 was and whether it was stronger than the normal x64


It's a version that can take advantage of the SSE4.2 processor instruction in the new machines like Core i7's and Phenom II. Therefore this R4 version is a bit faster and can play a bit stronger than normal R4.

Regards,
Gaмßito.
Parent - - By keevilp (*) [gb] Date 2010-05-30 11:13
Cheers All Sorted.

One additional question......

Would you use the standard parameters that come with Deep Rybka 4 x64?

Or can they be tweaked to make the software stronger.

I am using the program to analyse games via Chessbase.
Parent - By Vempele (Silver) [fi] Date 2010-05-30 11:25

> Or can they be tweaked to make the software stronger?


Trick question: you want "Always score main move" to be on when analyzing, but it's off by default because it's weaker when playing.
Parent - By Gaмßito (****) [cr] Date 2010-05-30 11:26

> Would you use the standard parameters that come with Deep Rybka 4 x64?


Standard parameters are fine in my opinion and I am using these, right now. But of course they can be tweaked in order that Rybka can play a bit stronger. The problem is that still there are no enough information, but for sure that later we will have more information about this.

Also note that if you tweaked things incorrectly, Rybka also can play much worst. It's not easy, so, you need to adjust things carefully. :-)

Regards,
Gaмßito.
Parent - By Uly (Gold) [mx] Date 2010-05-31 07:58

> Would you use the standard parameters that come with Deep Rybka 4 x64?


If you use the engine for analysis, you may also tick the "Display Upperbounds" box so Rybka tells you when a move is getting much worse than expected.

For games, check if on your conditions Rybka plays too fast or too slow (for this, check her time usage relative to the opponent), if she gets to low on the clock try decreasing Normal Move time, if she has too much time on the clock at the middle of the game try increasing Normal Move time. For slow blitz or longer time controls (like 10 0 or 16 0 and beyond) you may want to try increasing Max move time as that may help her.

You can also find better piece values, but I'd only enter this after getting the time management right.
Up Topic Rybka Support & Discussion / Rybka Support / Deep Rybka 4 x64 -v- SSE42 x64

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