hi. just a question
the default contempt is 24, what if i have a slow machine (smartphone) vs 16 core pc
now the stockfish will play risky game with bad results
it not now contempt=0 better? or small minus like -10?
stockfish contempt vs superior machine
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stavros
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- Joined: Tue Dec 02, 2014 1:29 am
Re: stockfish contempt vs superior machine
nobody?
can anyone help? for example smarphone(750kn/s) st10 vs 16 core pc with houdini 6
sf10 contempt=24 or 0?
can anyone help? for example smarphone(750kn/s) st10 vs 16 core pc with houdini 6
sf10 contempt=24 or 0?
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Eelco de Groot
- Posts: 4561
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Re: stockfish contempt vs superior machine
The strength difference seems too large. No contempt lowering could compensate. For small difference I have said that I think now Stockfish is tuned with contempt so much against itself I would just leave it on always unless it bothers you but it is anybody's guess what actually happens until you try it. On Fishcooking the idea is that it superscales 
No wrong, it hyperscales There you go, I did not know that word even existed 
No wrong, it hyperscales There you go, I did not know that word even existed Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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stavros
- Posts: 165
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Re: stockfish contempt vs superior machine
ok i played manualy 2 sets of 10 games
smartphone 900kn sf10 c=24 vs my pc 4 cores 6700kn/s (houdini 5) score 0-6-4 WDL
----------------------------------c=0-----------------------------------------------------------score 0-8-2 WDL
and yes opticaly watching the games the c=0 is nore solid and when it loses is very hard for pc (at endgames after tough battle)
with c=24 the sf10 the style is very loose and the pc outplays it more easy and early midlegames
so the contempt is only for weaker engines.if the hardware is weak for example 4 cores vs 16 core the 4 core machine must have lower contempt
aim wrong?
smartphone 900kn sf10 c=24 vs my pc 4 cores 6700kn/s (houdini 5) score 0-6-4 WDL
----------------------------------c=0-----------------------------------------------------------score 0-8-2 WDL
and yes opticaly watching the games the c=0 is nore solid and when it loses is very hard for pc (at endgames after tough battle)
with c=24 the sf10 the style is very loose and the pc outplays it more easy and early midlegames
so the contempt is only for weaker engines.if the hardware is weak for example 4 cores vs 16 core the 4 core machine must have lower contempt
aim wrong?
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Nordlandia
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: stockfish contempt vs superior machine
I think you're right stavros. Based on the fact that hardware is uneven lowering contempt to 0 or even negative is probably ideal for the weaker side.
I'm yet not sure which minus value is appropriate for that case. Any suggestion for slow machine (smartphone) vs 16 core pc?
Now i think it's safe to say that Houdini 6 need negative contempt against stockfish dev. Negative 2 or minus 3 is good starting points.
Based on my observation: it's definitely harder for sf dev to beat h6 if Houdini use negative contempt (which encourage draw and safer play in general).
Value of 0 was ideal upon Houdini 6's release, sf is considerable stronger now.
I'm yet not sure which minus value is appropriate for that case. Any suggestion for slow machine (smartphone) vs 16 core pc?
Now i think it's safe to say that Houdini 6 need negative contempt against stockfish dev. Negative 2 or minus 3 is good starting points.
Based on my observation: it's definitely harder for sf dev to beat h6 if Houdini use negative contempt (which encourage draw and safer play in general).
Value of 0 was ideal upon Houdini 6's release, sf is considerable stronger now.