Search found 2893 matches

by Rebel
Tue Aug 25, 2020 7:06 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: LMR - lack of Alpha-Eval check?
Replies: 7
Views: 1203

Re: LMR - lack of Alpha-Eval check?

In my LMR code I have: if (eval_score > alpha) reduce less When I remove the code I get a speed-up of 20-25% in depth but in selfplay it loses 5-6 elo. Now I have changed the code into: if (eval_score - SEE > alpha) reduce less // SEE is the highest hanging piece that in 90-95% of the cases will be...
by Rebel
Sun Aug 23, 2020 5:52 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: An alternative to IID
Replies: 40
Views: 5315

Re: An alternative to IID

Not really. Printing depth has never contributed anything to Elo. It is purely a service to the engine user. Intentionally lying about it seems rather immoral. People did not look kindly upon Vas, for cheating with the depth. Or upon Robert, for adding 14% to his nps. Both had high Elo, as well as ...
by Rebel
Sun Aug 23, 2020 2:01 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: LMR - lack of Alpha-Eval check?
Replies: 7
Views: 1203

LMR - lack of Alpha-Eval check?

In my LMR code I have: if (eval_score > alpha) reduce less When I remove the code I get a speed-up of 20-25% in depth but in selfplay it loses 5-6 elo. Now I have changed the code into: if (eval_score - SEE > alpha) reduce less // SEE is the highest hanging piece that in 90-95% of the cases will be ...
by Rebel
Sun Aug 23, 2020 1:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: An alternative to IID
Replies: 40
Views: 5315

Re: An alternative to IID

hgm wrote:
Sat Aug 22, 2020 5:24 pm
As for most modern engines the PV was about the only branch in the tree for which they were not lying about the depth, reducing in the PV means that the reported depth now is a total lie...
As long as one doesn't lie against elo :D
by Rebel
Sat Aug 22, 2020 4:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: An alternative to IID
Replies: 40
Views: 5315

Re: An alternative to IID

Took IID out (of my oldie) and replaced it with a full ply reduction without research and it gave me +17 elo after 5000 games. Not sure if that works for modern searchers. Thanks Ed for sharing. But I have one question, you do this only at pv nodes (beta != alpha + 1) like it's done on IID, or you ...
by Rebel
Fri Aug 21, 2020 7:09 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Benjamin 1.0 Gauntlet for CCRL 40/15
Replies: 4
Views: 554

Re: Benjamin 1.0 Gauntlet for CCRL 40/15

CCRL 40/15 Rating List - Custom engine selection 1169618 games played by 2696 programs, run by 23 testers Ponder off, General books (up to 12 moves), 3-4-5 piece EGTB Time control: Equivalent to 40 moves in 15 minutes on an Intel i7-4770k. Computed on August 15, 2020 with Bayeselo based on 1'169'61...
by Rebel
Wed Aug 19, 2020 9:02 am
Forum: Computer Chess Club: General Topics
Topic: Reliving the 80's at 100 Mhz.
Replies: 14
Views: 1925

Re: Reliving the 80's at 100 Mhz.

Hi Ed, Please can You run latest SF NNUE in Speedy Rating test? thanks in advance EPD : epd\lc1.epd Time : 1000ms Max Time Hash Engine Points Used Time Found Pos Elo Score Score ms Mb Cpu Errors 1 Stockfish-NNUE 337741 11:34:00.9 24957 40000 3377 400000 84.44% 1000 128 1 0 2 Stockfish 11 324287 11:...
by Rebel
Sun Aug 16, 2020 10:21 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: An alternative to IID
Replies: 40
Views: 5315

Re: An alternative to IID

Terje wrote:
Sun Aug 16, 2020 10:16 pm
Replacing IID with this gains 3-8 elo in Weiss, lower with higher TC / threadcount.
Not bad for changing 2 lines of code :wink:
by Rebel
Sat Aug 15, 2020 7:52 pm
Forum: Computer Chess Club: General Topics
Topic: Reliving the 80's at 100 Mhz.
Replies: 14
Views: 1925

Re: Reliving the 80's at 100 Mhz.

Hi Ed, Please can You run latest SF NNUE in Speedy Rating test? thanks in advance EPD : epd\lc1.epd Time : 1000ms Max Time Hash Engine Points Used Time Found Pos Elo Score Score ms Mb Cpu Errors 1 Stockfish-NNUE 337741 11:34:00.9 24957 40000 3377 400000 84.44% 1000 128 1 0 2 Stockfish 11 324287 11:...
by Rebel
Sat Aug 15, 2020 2:20 pm
Forum: Computer Chess Club: General Topics
Topic: Reliving the 80's at 100 Mhz.
Replies: 14
Views: 1925

Re: Reliving the 80's at 100 Mhz.

The 6502 running at 100 Mhz ? It does, my old MM5, Polgar, Milano etc. are put in a $50 FPGA card and currently tested again in the German nostalgic forum (Google translation is your friend) where computer enthusiasts are reliving the 80's. http://rebel13.nl/home/whatever.html Hehe, how cool, it is...