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That's interesting! But shouldn't it still be sub-linear, since the later moves should be cheaper to search (better move ordering, fewer moves to search) than the main PV?

OK, so potentially we're either looking at something wrong in my timing, or a bona fide Stockfish bug?

Yes, the point of setting MultiPV to 100 is to get all moves, so it's intentional. I'm a bit confused at the importance of it being inside iterative deepening, though; I assumed iterative deepening was only run at the root?

So, of course I get why MultiPV is much slower than a regular single-PV search; you can't use the cutoffs and have to research suboptimal moves to score them. But still, the slowdown seems extreme. Right now, I'm searching the same position on Stockfish 11 on very similar hardware (basically two-soc...

Are we also going to call instructions like XLAT "phony baloney" also because it perform poorly (even on Intel?) XLAT is pretty pony baloney! It's a relic of the 8086 days that wasn't really a good idea even back then. The idea that GCC doesnt have a say is wrong. The goal of the compiler should be...

It isn't really GCC's fault. Stockfish simply goes and asks the compiler (well, preprocessor) “does the CPU I'm compiling for support BMI2?”, and if so, sends BMI2 code to the compiler. GCC has no say in the matter once it has given a truthful answer. (Not that there's a good way to ask “does the CP...

More RAM would help, and most likely, your SSD is also pretty slow. Failing that, you can ask to probe less often (increase SyzygyProbeDepth).

jp wrote: ↑

Wed Aug 14, 2019 11:51 pm

That may be part of the confusion. Some commentators think it's run on a "university supercomputer".

That's just because people don't know what a supercomputer is.

Is NTNU interested in chess?

Nope.

I think you simply have to +ask+ the guys who matter if you have a project potentially worthy of sponsorship. Yeah, the problem is figuring out who the guys who matter is, and how to get their ear :-) And we are talking +sesse+ here, „the Norwegian super computer“ that has been mentioned again and ...

noobpwnftw wrote: ↑

Tue Aug 13, 2019 9:32 pm

I hope I'd live long enough to see Olympics played electronically.

Just measure genetics + some physical parameters and decide the winner?