Can a chess engine pray?

Discussion of chess software programming and technical issues.

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Sopel
Posts: 391
Joined: Tue Oct 08, 2019 11:39 pm
Full name: Tomasz Sobczyk

Re: Can a chess engine pray?

Post by Sopel »

Dann Corbit wrote: Fri Mar 25, 2022 11:41 am
Sopel wrote: Thu Mar 24, 2022 3:39 pm
Stockfish tends to get in trouble against LC0, but but then gives LC0 a beating in the endgame.
Stockfish often has 1000 times as many TB hits in the endgame compared to LC0 on my machine.
It's amazing what A0 propaganda did. Not only is Stockfish better than Lc0 in every element of play but also TBs have negligible impact on playing strength.
You are correct about SF having the same strength difference regardless of the number of chessmen on the board. I did some statistical calculations using my SQL database, and I think you are correct. I suppose that I had heard that said, and when I watched games where LC0 got ahead early, I simply assumed that was the reason. But SF gets ahead early as often as LC0.

As to Syzygy tablebase files, experiments have show a +50 Elo gain on several occasions.
However, we have no data for high speed SSD based files at long time control, so projections Elo gain would be conjecture.
It could even be negative {with super-powerful compute resources, it is possible that the lookup slows down the search enough to hurt} or it might be 200 Elo. Nobody knows. I did find that SF's search slows down tremendously at long time control if I put the SSD files on mechanical disk drives rather than my m.2 PCIe4.0 drives.
I'm not sure where you have the +50 elo figure from. The only tests I know are here ("Info" sheet) and show that a 4yo cfish with 100k nodes per move gains +22 elo from tablebases; I expect this number to be much smaller now and at a reasonable time control.
dangi12012 wrote:No one wants to touch anything you have posted. That proves you now have negative reputations since everyone knows already you are a forum troll.

Maybe you copied your stockfish commits from someone else too?
I will look into that.
Guenther
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Location: Regensburg, Germany
Full name: Guenther Simon

Re: Can a chess engine pray?

Post by Guenther »

Dann Corbit wrote: Fri Mar 25, 2022 11:41 am ...snip...

As to Syzygy tablebase files, experiments have show a +50 Elo gain on several occasions.
...snip...
You always repeat a memory error of yours, now it's probably already the third time.
forum3/viewtopic.php?f=2&t=76084&p=8765 ... in#p876566
https://rwbc-chess.de

[Trolls n'existent pas...]
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RubiChess
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Full name: Andreas Matthies

Re: Can a chess engine pray?

Post by RubiChess »

There is some info about TB tests in the Fishtest wiki:
https://github.com/glinscott/fishtest/wiki/UsefulData

Scroll down to "Elo gain using syzygy".

I have no idea how old these tests are but sure is: The newer the SF, the smaller the gain by TB.