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Up Topic The Rybka Lounge / Test Positions / Analyzing position and hardware
- - By rov (*) Date 2020-10-19 13:38
It is about analyzing not playing.

I have 6 physical cores, and someone has 12. In both case 3,8 GHz processor and rest of hardware similar.

Is it true that I have to use 2 times more time engine working to achieve the same result as someone who has 12 cores ?

or maybe I will never achieve the same result even if I spend 4 times more time ?

or is it enough to achieve the same number of analysed nodes to get the same result, as this with 12 cores.
Parent - By user923005 (****) Date 2020-10-20 00:14
It is never so simple.
The EGTB files are important for analysis.
If you put EGTB files on high speed gumstick (m.2) SSDs, you will get better answers.
Time and cores is not enough either.
If you explore the various choices in an intelligent way, you can do better.
That is (for instance) the function of IDEA search used by Aquarium.
But some people can also enhance by hand analysis.
If all other things are the same, and someone runs twice as many threads as you, you will do a little bit better by analyzing twice as long.
That is because additional threads do not add strength in a linear fashion because of SMP loss.
Parent - By MrKris (***) Date 2020-10-20 05:48
Efficiency goes down as core counts increases.

You should do slightly better if you use 2x the time the 12 core uses.

Though there is not many games yet CCRL has only 42 Elo for 4x core count:
http://ccrl.chessdom.com/ccrl/4040/rating_list_all.html
1 Stockfish 12 64-bit 4CPU  3522  +30  −29  76.5%  −174.7  45.9%  394 games
...
  Stockfish 12 64-bit       3480  +19  −19  78.3%  −190.3  42.5%  974
Parent - By rov (*) Date 2020-10-20 19:20 Upvotes 1
Thank You for answer.
Up Topic The Rybka Lounge / Test Positions / Analyzing position and hardware

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