Search found 339 matches

by Raphexon
Thu Jan 14, 2021 9:07 am
Forum: Computer Chess Club: General Topics
Topic: NNUE nets with depth of 20?
Replies: 8
Views: 427

Re: NNUE nets with depth of 20?

It's a quantity vs quality tradeoff. Required nodes to reach a given depth behaves exponentially. A billion positions analyzed to depth 8 takes a 24 hours with a modern 12 core. Depth 12 takes 10 times that. Depth 20 takes (guesstimate) 750-1000 times as long as depth 8. Without distributed generat...
by Raphexon
Thu Jan 14, 2021 8:24 am
Forum: Computer Chess Club: General Topics
Topic: NNUE nets with depth of 20?
Replies: 8
Views: 427

Re: NNUE nets with depth of 20?

It's a quantity vs quality tradeoff. Required nodes to reach a given depth behaves exponentially. A billion positions analyzed to depth 8 takes a 24 hours with a modern 12 core. Depth 12 takes 10 times that. Depth 20 takes (guesstimate) 750-1000 times as long as depth 8. Without distributed generati...
by Raphexon
Mon Jan 11, 2021 10:03 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish NNUE speed is improved a lot
Replies: 3
Views: 789

Re: Stockfish NNUE speed is improved a lot

Because in the past NNUE was pure and now it's hybrid.

Most of the speedup comes from classical eval being used on some nodes.
by Raphexon
Thu Jan 07, 2021 7:50 am
Forum: Computer Chess Club: General Topics
Topic: BMI2 vs AVX2 (Stockfish versions)
Replies: 8
Views: 691

Re: BMI2 vs AVX2 (Stockfish versions)

Hi everybody, Is there a difference between the two? Is one instruction set faster than the other? My CPU (10900k) supports both of them. Thx. Generally speaking, Intel processors that support bmi2 are faster with BMI2. Current AMD processors support bmi2, but are generally faster with AVX2. YMMV, ...
by Raphexon
Tue Dec 29, 2020 11:52 am
Forum: Computer Chess Club: General Topics
Topic: CCC has serious hardware update!
Replies: 107
Views: 4030

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 pr...
by Raphexon
Wed Dec 09, 2020 1:35 pm
Forum: Computer Chess Club: General Topics
Topic: Off-the-Air.com incident
Replies: 4
Views: 573

Re: Off-the-Air.com incident

So we could realize just how pathetic we would be without! :x
by Raphexon
Tue Dec 08, 2020 9:06 am
Forum: Computer Chess Club: General Topics
Topic: M1 Apple Silicon for Chess?
Replies: 52
Views: 6235

Re: M1 Apple Silicon for Chess?

Chip with trash for IO consumes less energy than a big x570 board that has a ton of IO who would have thought? Once they start adding IO energy consumption will rise with it. Not because ARM is inherently superior but because Apple can take the cost of making their systems efficient. Apple doesn't h...
by Raphexon
Sat Dec 05, 2020 10:33 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Simplified chess variants?
Replies: 13
Views: 2468

Re: Simplified chess variants?

Makruk and Seirawan are "extremely" simple. But an 1800 elo player has no chance of playing perfectly. Seirawan chess is not simpler than FIDE chess. The rules are a superset of FIDE rules and the game tree is bigger too. I don't know about Makruk but it looks about the same as FIDE chess. In this ...
by Raphexon
Thu Dec 03, 2020 8:22 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Simplified chess variants?
Replies: 13
Views: 2468

Re: Simplified chess variants?

Makruk and Seirawan are "extremely" simple. But an 1800 elo player has no chance of playing perfectly.