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Hot Topic (More than 10 Replies) Fat Fritz (Read 2266 times)
MaxJudd
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Current Config. (April 2020) for LC0/FatFritz
Reply #11 - 04/05/20 at 13:49:00
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I was thinking of trying out a FatFritz tuned Lc0 as a complement to Stockfish 11.  Is there a GPU configuration for less than $500 that will give decent results when added to an existing laptop or desktop with an appropriate port or slot?  Alternatively, in the short term is it better to simply rent computer time via the Chessbase Engine Cloud with the idea that in a year or two compatible GPUs will be much more affordable?
  
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trw
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Re: Fat Fritz
Reply #10 - 03/11/20 at 22:20:35
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an ordinary chessplayer wrote on 03/11/20 at 21:23:48:
I came here to say the same thing.

Quote:
Using the open-source project Leela Chess as a foundation... --Albert Silver https://en.chessbase.com/post/fat-fritz-what-on-earth-is-that


I doubt they did anything special beyond compiling for the target machine, otherwise it would have been mentioned.



Sounds that way... questionable that this is legal under GPL when it is for sale...  Roll Eyes
  
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an ordinary chessplayer
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Re: Fat Fritz
Reply #9 - 03/11/20 at 21:23:48
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I came here to say the same thing.

Quote:
Using the open-source project Leela Chess as a foundation... --Albert Silver https://en.chessbase.com/post/fat-fritz-what-on-earth-is-that


I doubt they did anything special beyond compiling for the target machine, otherwise it would have been mentioned.
  
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proustiskeen
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Re: Fat Fritz
Reply #8 - 03/11/20 at 20:15:26
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Not quite.

The engine - the part that makes the moves - is the same as LC0.

But the network - the brain that the engine "thinks" with - is very different. (Totally legal under GPL, btw.)

The way that the engine is configured is different too.
  
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trw
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Re: Fat Fritz
Reply #7 - 03/11/20 at 18:16:06
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JFugre wrote on 11/14/19 at 12:20:05:
The engine is just lc0 so everything about that applies.



Wait Fat Fritz is just a duplicate of lc0?!
  
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mattchess
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Re: Fat Fritz
Reply #6 - 11/25/19 at 19:53:04
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JFugre wrote on 11/25/19 at 13:06:57:
mattchess wrote on 11/23/19 at 21:01:07:
I've found that LC0 and Fat Fritz run much better through chessbase using the -rtx optimized versions that chessbase configures automatically than my manually set up LC0.  Obviously I did something wrong when optimizing manually -


Use the cudnn-fp16 backend.



Thanks - yes that sped things up for me with LC0 in my manual install
  
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JFugre
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Re: Fat Fritz
Reply #5 - 11/25/19 at 13:06:57
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mattchess wrote on 11/23/19 at 21:01:07:
I've found that LC0 and Fat Fritz run much better through chessbase using the -rtx optimized versions that chessbase configures automatically than my manually set up LC0.  Obviously I did something wrong when optimizing manually -


Use the cudnn-fp16 backend.
  
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mattchess
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Re: Fat Fritz
Reply #4 - 11/23/19 at 21:01:07
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I've found that LC0 and Fat Fritz run much better through chessbase using the -rtx optimized versions that chessbase configures automatically than my manually set up LC0.  Obviously I did something wrong when optimizing manually - but it is about a 3X improvement in kN/S.  So I am quite pleased with that feature of Fritz 17.

I should note I have an RTX 2080
  
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an ordinary chessplayer
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Re: Fat Fritz
Reply #3 - 11/15/19 at 16:36:04
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This ChessBase article is highly relevant. There is a promise of a followup article discussing complete systems.
https://en.chessbase.com/post/fat-fritz-what-videocard-to-buy
  
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JFugre
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Re: Fat Fritz
Reply #2 - 11/14/19 at 12:56:16
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For lc0 the story is pretty much:

CPU / no GPU - don't bother, use the latest Stockfish dev build
GTX 9x0 / 10x0 - works, especially if it's a high end card it will get close to Stockfish
GTX 16xx - works, reasonably fast, affordable cards
RTX 20x0 - works, very very fast, and quite expensive

  
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JFugre
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Re: Fat Fritz
Reply #1 - 11/14/19 at 12:20:05
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The engine is just lc0 so everything about that applies.
  
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Pawnpusher
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Fat Fritz
11/14/19 at 11:47:17
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There seems to be some discussion about Fritz 17 and the neural network, and what model of gpu is the minimum to get good results. Anyone up to speed on this issue?
  
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