Search found 4130 matches

by Laskos
Thu Feb 14, 2019 7:23 pm
Forum: Computer Chess Club: General Topics
Topic: Knight equals 48 pawns?
Replies: 18
Views: 962

Re: Knight equals 48 pawns?

The job of a chess engine eval is not to provide a value based upon inferior play of opponent, but an objective measure of the position (assuming best play as far as it knows), at least in my eyes. Now if someone wants to change that definition, they are certainly free to do so, but I doubt many wi...
by Laskos
Thu Feb 14, 2019 6:49 pm
Forum: Computer Chess Club: General Topics
Topic: Knight equals 48 pawns?
Replies: 18
Views: 962

Re: Knight equals 48 pawns?

jhellis3 wrote:
Thu Feb 14, 2019 6:11 pm
So you disagree that the side starting the game a knight down is likely objectively lost?
Against me?
by Laskos
Wed Feb 13, 2019 9:40 pm
Forum: Computer Chess Club: General Topics
Topic: Knight equals 48 pawns?
Replies: 18
Views: 962

Re: Knight equals 48 pawns?

I downloaded the latest Lc0 about a week ago on my laptop (with GPU 1060), and looked at its analysis (infinite mode) on lots of positions. Typically, in the opening evals are roughly double what they should be; in general a clean pawn up shows as about two pawns. However, the initial position with...
by Laskos
Tue Feb 12, 2019 2:31 pm
Forum: Computer Chess Club: General Topics
Topic: Test40 late nets scale better than test10 and test30 nets to longer TC?
Replies: 7
Views: 1040

Re: Test40 late nets scale better than test10 and test30 nets to longer TC?

Again, forgot to mention the engine settings for my GPU: Backend=cudnn-fp16 MinibatchSize=512 NNCacheSize=10000000 The rest are default. And a little "secret" when selecting the test40 nets: I am looking at self-play Elo, but also at performance in very tactical test-suites. I observed that improvin...
by Laskos
Tue Feb 12, 2019 2:15 pm
Forum: Computer Chess Club: General Topics
Topic: Test40 late nets scale better than test10 and test30 nets to longer TC?
Replies: 7
Views: 1040

Re: Test40 late nets scale better than test10 and test30 nets to longer TC?

I got a new and pretty impressive result with one of the newest test40 nets. Lc0 v20.2 is on 2 CPU threads and RTX 2070 GPU. SF10 on 4 threads on 4 i7 4790 OCed cores. Leela Ratio is about 2 ~ 3 Openings are Stefan Pohl's GM 4-movers. One of the strongest test10 nets, ID11261 0.25m + 0.25s Score of ...
by Laskos
Wed Feb 06, 2019 9:26 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Some properties of the Type I error in p-value stopping ru
Replies: 4
Views: 1573

Re: Some properties of the Type I error in p-value stopping ru

And here are the very first early stops safely allowed, where the Type I error (false positive) is significantly smaller than 5%. It is assumed that we don't know anything about engines (uniform prior), therefore p-vale depends only on Wins and Losses. An easy hack in "Mathematica" to derive the tab...
by Laskos
Wed Feb 06, 2019 6:00 am
Forum: Computer Chess Club: General Topics
Topic: Test40 late nets scale better than test10 and test30 nets to longer TC?
Replies: 7
Views: 1040

Re: Test40 late nets scale better than test10 and test30 nets to longer TC?

I checked in an earlier thread the scaling of test10 nets, coming to conclusion that at longer TC and high Leela Ratio, they do not scale very well against SF10: I have put the t10, t30 and t40 nets on a scale and they all weigh the same. One can conclude that they all scale the same. No, that's su...
by Laskos
Tue Feb 05, 2019 8:29 pm
Forum: Computer Chess Club: General Topics
Topic: Test40 late nets scale better than test10 and test30 nets to longer TC?
Replies: 7
Views: 1040

Re: Test40 late nets scale better than test10 and test30 nets to longer TC?

Forgot to mention the engine settings for my GPU:

Backend=cudnn-fp16
MinibatchSize=512
NNCacheSize=10000000

The rest are default.
by Laskos
Tue Feb 05, 2019 7:56 pm
Forum: Computer Chess Club: General Topics
Topic: Test40 late nets scale better than test10 and test30 nets to longer TC?
Replies: 7
Views: 1040

Test40 late nets scale better than test10 and test30 nets to longer TC?

I checked in an earlier thread the scaling of test10 nets, coming to conclusion that at longer TC and high Leela Ratio, they do not scale very well against SF10: http://talkchess.com/forum3/viewtopic.php?f=2&t=69068 Lc0 v20.1 is on 2 CPU threads and RTX 2070 GPU. SF10 on 4 threads on 4 i7-4790 OCed ...
by Laskos
Mon Feb 04, 2019 5:41 pm
Forum: Computer Chess Club: General Topics
Topic: Lc0 with latest test30 nets is vastly superior positionally
Replies: 39
Views: 4542

Re: Lc0 with latest test30 nets is vastly superior positionally

Kai, have you tested t40 yet? Yes, test40 well surpassed all AB engines positionally on openings , but it's still significantly behind best test30 nets. What about positionally not on openings? Maybe this is hard to test... It's hard to get too excited about Lc0 being good at openings (the ones it ...