Search found 480 matches

by brianr
Thu Dec 10, 2020 4:50 pm
Forum: Computer Chess Club: General Topics
Topic: A different way to develop chess engines
Replies: 7
Views: 937

Re: A different way to develop chess engines

Your approach has indeed been done for several decades.
It works at first, but then it becomes clearer that tuning for a test set is not the same as actual game strength.
Recall the early focus on WAC 300 scores...
by brianr
Mon Dec 07, 2020 10:03 pm
Forum: Computer Chess Club: General Topics
Topic: Another Lc0 problem
Replies: 6
Views: 671

Re: Another Lc0 problem

Works just fine for me from a cmd window...
by brianr
Thu Nov 26, 2020 10:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney November
Replies: 56
Views: 7296

Re: On-line engine blitz tourney November

Ras wrote:
Thu Nov 26, 2020 7:35 pm
brianr wrote:
Thu Nov 26, 2020 7:07 pm
Is there a tourney manager that uses the higher precision timers?
I'm not on Windows anymore, but under Linux, c-chess-cli has very precise timing (via clock_gettime with monotonic clock).
Thanks, I have not tried that one yet.
by brianr
Thu Nov 26, 2020 7:07 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney November
Replies: 56
Views: 7296

Re: On-line engine blitz tourney November

Is there a tourney manager that uses the higher precision timers?
by brianr
Thu Nov 26, 2020 10:31 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney November
Replies: 56
Views: 7296

Re: On-line engine blitz tourney November

I would be surprised if most engines would benefit from more accurate (i.e. msec) specification of the time on their clocks. The clocks they use for their own timing decisions typically also ticks only once every 16 msec. And scheduling delays would become very important at the msec level. You shou...
by brianr
Thu Nov 26, 2020 7:58 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney November
Replies: 56
Views: 7296

Re: On-line engine blitz tourney November

True. UCI wouldn't have this issue, but the Winboard side is CECP only. However, it doesn't make much sense to use a GUI for such fast games because the display will cost a disproportionate amount of time. It would make more sense to use a CLI solution. You may not know that Winboard has a no GUI o...
by brianr
Fri Nov 13, 2020 6:46 pm
Forum: Computer Chess Club: General Topics
Topic: CPU NN question
Replies: 12
Views: 1689

Re: CPU NN question

There are many different NN sizes and architectures.

The larger ones like Lc0 uses are only really practical on GPUs.

The smaller ones like SF-NNUE run on CPUs (and are very cleverly incrementally updated to make even faster).
by brianr
Thu Nov 05, 2020 11:23 am
Forum: Computer Chess Club: General Topics
Topic: What is the magical incantation to make LC0 use both?
Replies: 12
Views: 1082

Re: What is the magical incantation to make LC0 use both?

This was just posted on the Discord: TilpsToday at 6:09 AM !2gpus Little TeapotBOTToday at 6:09 AM To run Lc0 on 2 GPUs: Specify the following UCI parameters: Backend: multiplexing BackendOpts: backend=cudnn-fp16,(gpu=0),(gpu=1) Threads: 3 OR add the following in command line: --backend=multiplexing...
by brianr
Tue Oct 20, 2020 2:30 pm
Forum: Computer Chess Club: General Topics
Topic: New AMD Zen 3 and Ryzen processors
Replies: 34
Views: 5541

Re: New AMD Zen 3 and Ryzen processors

I also have an old i920 that I was able to comfortably overclock to 4GHz (from 2.6GHz). Over the years I added more RAM, SSD, faster GPU (GTX770 to 1070 to 2060), etc. It was fine for most things. My even older Q6600 (also easily OC'd, but so old no popcnt) would get the "hand me down" components fr...
by brianr
Sun Oct 11, 2020 9:52 pm
Forum: Computer Chess Club: General Topics
Topic: Interrupting Cutechess-Cli with CTRL+C yields to unpredictable results.
Replies: 10
Views: 1009

Re: Interrupting Cutechess-Cli with CTRL+C yields to unpredictable results.

I am only using a few of the 7 piece: Volume in drive E has no label. Volume Serial Number is 9449-A788 Directory of E:\Syzygy-7 10/11/2020 05:50 PM <DIR> . 10/11/2020 05:50 PM <DIR> .. 10/11/2020 05:50 PM 0 7.txt 06/16/2020 01:33 AM 30,746,474,768 KBPPvKBP.rtbw 06/16/2020 01:55 AM 5,561,195,536 KBP...