Search found 359 matches

by Raphexon
Thu Mar 25, 2021 6:34 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Why doesn't this seemingly over-powered technique work?
Replies: 5
Views: 719

Re: Why doesn't this seemingly over-powered technique work?

it seems like NNUE uses the normal Stockfish calculation to look several moves deep and then uses a neural net type evaluation instead of a static evaluation (do correct me if I am wrong here). This gives it a clear edge over normal Stockfish, since it effectively gets a few more moves of 'free' de...
by Raphexon
Tue Mar 23, 2021 9:49 am
Forum: Computer Chess Club: General Topics
Topic: Marvin 5.00 - Ethereal 12.75, 1:0 mate after 33!! ... great game!
Replies: 17
Views: 1114

Re: Marvin 5.00 - Ethereal 12.75, 1:0 mate after 33!! ... great game!

Looks like Stockfish 13 would have also played b7-b5 until depth 19. (2 million nodes)

But even weaker engine seem to find it after a few seconds.
So not a very hard position, but one that will induce blunders at low tc.
by Raphexon
Fri Mar 12, 2021 7:59 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 126
Views: 22479

Re: stockfish 10 vs. Mephisto III S Glasgow

Comparing nodes 1:1 between two engines is also false. As it stands, SFdev is the strongest entity for a Pentium II (Or any CPU with MMX or better), and that's a CPU from 1997. SF-HC would be the strongest on the older 32 bit CPUs. (going back all the way to 1985) On an i386 SF11 should still be abl...
by Raphexon
Wed Mar 10, 2021 4:13 pm
Forum: Computer Chess Club: General Topics
Topic: A random walk down NNUE street ….
Replies: 46
Views: 4432

Re: A random walk down NNUE street ….

Mike, a few thoughts 1) There’s not a lot of benefit to d11 at this stage. I’d just go with d6 or d8 until your net has figured out piece values. 2) generate 1b positions per generation. More is better. 3) start with lambda 0.0 (all result) and gradually add more eval. Not sure how fast to turn the...
by Raphexon
Tue Mar 09, 2021 3:32 pm
Forum: Computer Chess Club: General Topics
Topic: Cutochess cli
Replies: 39
Views: 2987

Re: Cutochess cli

I have a question. What is the difference between -tb PATHS and -tbpieces N. https://github.com/cutechess/cutechess/blob/master/projects/cli/res/doc/help.txt#L101 -tb PATHS Adjudicate games using Syzygy tablebases. PATHS should be semicolon-delimited list of paths to the compressed tablebase files....
by Raphexon
Tue Mar 02, 2021 4:11 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish node speed mystery
Replies: 7
Views: 913

Re: Stockfish node speed mystery

Or maybe hybrid eval gets called more with more cores.
by Raphexon
Sun Feb 28, 2021 3:31 pm
Forum: Computer Chess Club: General Topics
Topic: Rybka vs Fat Fritz controversies
Replies: 33
Views: 3361

Re: Rybka vs Fat Fritz controversies

I think for a while, everyone thought that chess engine progress will improve ... but it will improve mostly due to the improvement in hardware running bean counter engines. Rybka changed that thinking and it made clear that the software side of chess engines is where the major gain in ELO would co...
by Raphexon
Wed Feb 17, 2021 5:54 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Reinforcement learning project
Replies: 48
Views: 7986

Re: Reinforcement learning project

Aren't the repetition rules for Janggi really complicated (or even subjective in nature)?
How are those coded?
by Raphexon
Wed Feb 17, 2021 3:27 pm
Forum: Computer Chess Club: General Topics
Topic: Crystal 3.1 AVX2 or BMI2 for Intel Core ?
Replies: 2
Views: 487

Re: Crystal 3.1 AVX2 or BMI2 for Intel Core ?

Multithreading behaviour is not deterministic so results can (and will) change every run.
If you redo the test you will most likely find different times for the compiles again.

This result can be attributed to a lucky result for the AVX2 compile. (Or unlucky for BMI2)
by Raphexon
Tue Feb 16, 2021 10:38 am
Forum: Computer Chess Club: General Topics
Topic: FF2 verses SF, what are the important differences?
Replies: 16
Views: 2879

Re: FF2 verses SF, what are the important differences?

Perhaps off-topic; if so, please close or put in the right forum. Let's say I wanted to rebase the FF2 code changes on the latest Stockfish dev version. How would I do that? Is there a set of tools that would let me do that automatically? Can I do it through github? The source changes are trivial (...