Re: Chess.com 2018 computer chess championship
Posted: Tue Aug 21, 2018 11:04 am
http://tests.stockfishchess.org/tests/v ... 02b2e60162DrCliche wrote: ↑Tue Aug 21, 2018 6:33 am
Note that those tests were run on a single 192-core machine, so the second test merely pitted Stockfish against itself with hyperthreading enabled in one instance, and disabled in the other. At the level of the top engines, I don't think anyone would consider that to be poor scaling at all. I'm actually astonished that Stockfish on 192 cores gets 22±10 Elo stronger simply by turning on hyperthreading.
Well, since everyone has gone to lazy smp, those node counts simply reflect the same nodes being looked at with high multiplicity. Still waiting for someone to (re)implement a high-quality, non-lazy smp.
You never look the same nodes. You just look the nodes that were supposed to be cut .
One can prove that you reach higher depth faster with YBWC or DTS, but reaching higher depth faster (or slower in case of LazySMP) means actually nothing especially with LazySMPs weird tree shape.
Right. And this is what frustrates me. Higher depth should mean better performance. Provided you're searching the right line.Milos wrote: ↑Tue Aug 21, 2018 4:29 pmOne can prove that you reach higher depth faster with YBWC or DTS, but reaching higher depth faster (or slower in case of LazySMP) means actually nothing especially with LazySMPs weird tree shape.
The CPU engines will be the only engine running on the system, and will have full access to the processors (w/ 46 threads addressing 48 physical CPUs) while playing vs. Lc0DrCliche wrote: ↑Tue Aug 21, 2018 6:33 am There's no indication that the CPU engines will be given full access to the anemic CPU machine during games against Leela. The official documentation simply states the CPU engines will be limited to 46 threads and 8192 MB of hash without mention of any exceptions.
I can assure you there's no 'agenda'. We are simply trying to provide a fun and entertaining event that includes high-level and competitive chess. All of which I can guarantee. We are of course very interested in the Lc0 project, and are fascinated by it's unusual yet strong style of play (as are many), and have tried to provide it with a suitable platform in an effort to help it play to it's full and current potential. If funding allowed we would have gone with 8x Tesla v100s. We're not overly concerned if the CPU vs GPU hardware platforms equate perfectly or not. This is not an official (software) world championship event.
I was skeptical about it too but I'm willing to accept the empirical evidence that it does work.