Stockfish 17092216 vs. Clones

[Guenther]

Hi! Guenther,

I am not sure what you mean by using Brainfish book with McBrain. I just guess that McBrain should use Cerebellum book. If correct, then it would be unfair to the other chess engines because it is optimized to crush engines without the equivalent book. McBrain and Sugar has the capability to use Cerebellum. If Cerebellum is allowed for these chess engines, then they will produce a single opening which is Giuoco Piano over and over. It us ugly and it will end mostly in draws. Meanwhile Stockfish will be cloberred to death with just 5-moves opening book.

I wanted to say 'If McBrain did play with the Brainfish book the result is irregular again...' (the 'not' was a typo), but I see it did not,
thus the difference comes from the other setup problems.

I regularly played 7 simultaneous games with Linux/Arena/Wine and still can use the computer browsing the Internet or doing some compiling, file maintenance tasks, etc. With cute-cli I regularly use 12 concurrency and the computer is still responsive compared with Arena which is somewhat sluggish with 7 threads. The irregular tournament with Sugar Pro was done with 10 concurrency oblivious that Sugar and Raubfisch was using 4 threads for each concurrency. And in that 10 concurrency at leat 5 Sugar Pro and Raubfisch instances were running which concumed an equivalent of 20 threads + 5 threads for each remaining concurrency. Every now and then I checked the progress of that tournament and I never noticed any sluggishness even though the htop program shows 100% usage for all 4 CPU's.
For me, that's fantastic serendipity because I thought I could only have a maximum 12 threads for cutechess but it turned out that it is capable of using more than 20 threads for a 4-core CPU. This is an actual experience and the proof is in the PGN games posted which are all normal with no time losses.

Even if it seems ok for you, you can't use that much concurrency/threads, because the results will be meaningless, as cpu load will be split randomly.

I have not tried JSON yet but may try it someday when my simple set-up gets complicated.

Thanks.

That's not difficult and there are surely already examples here in the forum. I once took an advanced script setup of Ferdinand and modified
it for my needs. For the engines.json file there is e.g. a little snippet here:
http://talkchess.com/forum/viewtopic.ph ... gines+json

[drj4759]

Hi! Norman,

I would be glad to receive your cutechess actual setup example.

Thank you.