Search found 480 matches

by brianr
Wed Dec 30, 2020 9:34 pm
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

Interesting ignoring the error bars. That you are suggesting that SF NNUE scales better then SF11. As you add more cores. I never said anything other than SF-NNUE scales just fine, and I highlighted that the error bars are indeed quite large. Now, it is possible that SF-NNUE actually does scale bet...
by brianr
Wed Dec 30, 2020 7:02 pm
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

it was SF-NNUE v SF-11 8 CPUs # PLAYER : RATING ERROR POINTS PLAYED (%) W D L D(%) CFS(%) 1 SF-NNUE: 118 89 21.0 33 63.6 13 16 4 48.5 100 2 SF11 : 0 ---- 12.0 33 36.4 4 16 13 48.5 --- 4 CPUs # PLAYER : RATING ERROR POINTS PLAYED (%) W D L D(%) CFS(%) 1 SF-NNUE: 58 44 58.0 100 58.0 27 62 11 62.0 100 ...
by brianr
Wed Dec 30, 2020 6:42 pm
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

SF-NNUE scaled just fine going from 1 to 2, 4, and 8 threads (on 12 core box).
I did not test beyond 8, and the big tourney rigs have way more than 8 of course...
Results posted in SF-NNUE Discord several months ago, IIRC.
by brianr
Tue Dec 29, 2020 12:52 pm
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

Dann Corbit wrote:
Tue Dec 29, 2020 12:43 pm
Do I hear angels singing?
The angels were singing Alpha Zero four years ago.
The show went on the road and tickets were free.
And, now you want the angels to do a new show?
by brianr
Tue Dec 29, 2020 12:42 pm
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

No, N GPUs plus 1 is optimal number of CPUs, so a fast OC's six way would handle just about anything.
by brianr
Tue Dec 29, 2020 12:33 pm
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

Look at the specs for the max extra clock speeds...they are very low for the CPUs with a huge number of cores.
by brianr
Tue Dec 29, 2020 12:06 pm
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

The point is that on both CCC and TCEC the fast GPUs are being vastly underutilized by the extremely slow MHz CPUs.
by brianr
Tue Dec 29, 2020 11:23 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Null move pruning issue
Replies: 7
Views: 621

Re: Null move pruning issue

I did not notice passing a flag to your search to not do two null moves in a row...missed it the first time I looked. Also, it may not help in your engine, but I also only do null moves if if (alpha == beta - 1) Hold on... do you mean alpha == beta - 1 is the same as evaluate() >= beta ? Or "also" ...
by brianr
Tue Dec 29, 2020 11:14 am
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 5589

Re: CCC has serious hardware update!

As with the TCEC rig, the GPUs are very nice, but unfortunately the slow CPUs are a fairly severe handicap for GPU engines like Lc0, which do best with a small number of very fast CPUs. Of course, one could say that it is up to Lc0 to improve its CPU code to better utilize more CPUs, but this is pro...
by brianr
Wed Dec 23, 2020 6:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Null move pruning issue
Replies: 7
Views: 621

Re: Null move pruning issue

I did not notice passing a flag to your search to not do two null moves in a row...missed it the first time I looked.

Also, it may not help in your engine, but I also only do null moves if

if (alpha == beta - 1)