Search found 4319 matches

by syzygy
Thu Oct 15, 2020 11:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: EGTB compression
Replies: 2
Views: 356

Re: EGTB compression

I guess you mean LZ4, not LC4. My generator includes LZ4 compression code, but only for compressing intermediate files during generation. This is down at the lowest compression setting (I think) because otherwise it takes too long. The point of the compressing the intermediate files is to speed up t...
by syzygy
Thu Oct 15, 2020 11:07 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Hacking around CFish NNUE
Replies: 31
Views: 960

Re: Hacking around CFish NNUE

I wonder why auto-vectorization is not used instead of the manual SIMD code NNUE currently has. There is separate code for AVX2, SSE3,SSE2,SSE etc which is kind of ugly. Your code above can be easily auto-vectorized by the compiler, so I wonder why this approach is not taken. I don't see any operat...
by syzygy
Thu Oct 15, 2020 6:03 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish bench in i486 & Pentium 75mhz !
Replies: 65
Views: 6113

Re: Stockfish bench in i486 & Pentium 75mhz !

Hehe, the SupraDrive hard-disk with 10 MB for 800,- Deutsch Mark appeared around 1986, not sure what the 20 MB version was, there you go with NNUE on 6502 :) https://www.atarimagazines.com/v5n6/Supradrivefor8Bit.html Apparently the C64 could also be connected to a HDD: https://en.wikipedia.org/wiki...
by syzygy
Thu Oct 15, 2020 5:48 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish bench in i486 & Pentium 75mhz !
Replies: 65
Views: 6113

Re: Stockfish bench in i486 & Pentium 75mhz !

SF-NNUE depth 1 which is 500-1000 nodes is 2400Elo. That is at least 500 Elo above the best dedicated chess computers. SF-NNUE on 6502 would have for sure more than 1000nodes per move. It wouldn't be any contest, it would be a slaughter. and how is that supposed to work? the 6502 has a 16-bit addre...
by syzygy
Mon Oct 12, 2020 11:43 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish bench in i486 & Pentium 75mhz !
Replies: 65
Views: 6113

Re: Stockfish bench in i486 & Pentium 75mhz !

I'm afraid the network file may not fit on the harddisk of the i486. What about the i586? I did some googling. Hard disks in the early 90s seem to have been typically 40MB or larger, so the network could be stored. I don't know when 32MB of RAM or more became the norm, but already the i486 seems to...
by syzygy
Mon Oct 12, 2020 6:33 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish bench in i486 & Pentium 75mhz !
Replies: 65
Views: 6113

Re: Stockfish bench in i486 & Pentium 75mhz !

How well does the new Stockfish 12 work on Pentiums and i486? Reply from here : http://talkchess.com/forum3/viewtopic.php?p=863999#p863999 Some approximations here : http://www.talkchess.com/forum3/viewtopic.php?f=6&t=72485 http://www.talkchess.com/forum3/viewtopic.php?f=2&t=63857 A version close t...
by syzygy
Mon Oct 12, 2020 5:35 pm
Forum: Computer Chess Club: General Topics
Topic: Future of computer chess: 2 top engines?
Replies: 34
Views: 2159

Re: Future of computer chess: 2 top engines?

Jouni wrote:
Mon Oct 12, 2020 11:40 am
I fear, that soon we have only 2 top engines. Stockfish + derivates and Lc0 + derivates. I hope to be wrong :) .
For many years Rybka was the only top engine.
by syzygy
Sun Oct 11, 2020 1:24 pm
Forum: Computer Chess Club: General Topics
Topic: New AMD Zen 3 and Ryzen processors
Replies: 29
Views: 1590

Re: New AMD Zen 3 and Ryzen processors

So... any word on the implementation of BMI2, PEXT and PDEP? If it's still as bad as Ryzen 2, these CPU's are out of the question for me. (Also, they are built on an old platform when using AM4; just like Intel 10-xx CPU's built on the X299 platform from 2017.) I was doing some thinking on why AMD ...
by syzygy
Sun Oct 11, 2020 11:18 am
Forum: Computer Chess Club: General Topics
Topic: Slight change to rules of standard chess
Replies: 11
Views: 509

Re: Slight change to rules of standard chess

A simple rule change would breathe new life into chess. Allow the king to castle out of check. It would allow much more aggression to the game. I am surprised about the other answers, as they don't even address the biggest flaw, probably no chessplayers in this thread. The possibility to castle out...
by syzygy
Sat Oct 10, 2020 9:37 pm
Forum: Computer Chess Club: General Topics
Topic: Final Release of Ethereal, V12.75
Replies: 126
Views: 5692

Re: Final Release of Ethereal, V12.75

Btw, if I am not mistaken, the original Shogi NNUE engine was based on Stockfish. Apparently what I wrote, which was also not complex, is not understood at all since literally nothing what you wrote above corresponds to what I stated in any way or form. And yes, you are mistaken about the Shogi NNU...