Search found 69 matches

by MonteCarlo
Fri Apr 06, 2018 1:39 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero: Progress and Scaling. Relation to CCRL Elo
Replies: 604
Views: 117956

Re: LCZero: Progress and Scaling. Relation to CCRL Elo

Thanks for the update and that position, Kai! The biggest problem in that position is just that black's mate (in the line 136.Kh4 g5+ 137.Kxh5 Qf3+ 138.Kh6 Qh1+ 139.Qh3 Qxh3#) has a series of only winning moves, and the net assigns all of them but the last a very low probability of being played (4%,...
by MonteCarlo
Fri Apr 06, 2018 4:08 am
Forum: Computer Chess Club: General Topics
Topic: LCZero: Progress and Scaling. Relation to CCRL Elo
Replies: 604
Views: 117956

Re: LCZero: Progress and Scaling. Relation to CCRL Elo

Leela does not do playouts to the end of the game and then tabulate results, so the expected scores returned don't have to somehow be evenly divisible into the number of playouts/visits. Even if the MCTS only searches one line of play, and that line of play is only one ply deep, the NN will return a...
by MonteCarlo
Thu Apr 05, 2018 10:34 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero: Progress and Scaling. Relation to CCRL Elo
Replies: 604
Views: 117956

Re: LCZero: Progress and Scaling. Relation to CCRL Elo

Probably that "winrate" (expected score) is the average at the root; I'd have to look at the code to be sure, but that (or something similar) is almost certainly the case. It knows that Qh4 is 100%: Using 2 thread(s). Generated 1924 moves Detecting residual layers...v1...64 channels...6 bloc...
by MonteCarlo
Thu Apr 05, 2018 6:26 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero: Progress and Scaling. Relation to CCRL Elo
Replies: 604
Views: 117956

Re: LCZero: Progress and Scaling. Relation to CCRL Elo

Just to be clear, Leela does not REQUIRE different hardware than normal engines. It's just that as the network gets bigger, the performance penalty of running a CPU-only version will grow. For now, though, if you have a low-to-middle-end GPU, you might actually get better performance from the CPU-on...
by MonteCarlo
Thu Apr 05, 2018 2:27 am
Forum: Computer Chess Club: General Topics
Topic: LCZero: Progress and Scaling. Relation to CCRL Elo
Replies: 604
Views: 117956

Re: LCZero: Progress and Scaling. Relation to CCRL Elo

Thanks for the update Kai! On the one hand, it's quite possible that a fundamental change to its MCTS implementation will be required at some point if it wants to compete at the highest level, and the work Daniel Shawul has done with Scorpio could prove quite useful in that case (well, it's fantasti...
by MonteCarlo
Wed Apr 04, 2018 9:36 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero: Progress and Scaling. Relation to CCRL Elo
Replies: 604
Views: 117956

Re: LCZero: Progress and Scaling. Relation to CCRL Elo

Indeed. Leela's output is an expected score, not actually a win%. The wording on the site has since been changed, it seems, although now it includes this "50%=draw" bit in the legend, which caused some debate in the discord. Probably should just say "50%=equal chances" or some such thing ("expected ...
by MonteCarlo
Tue Apr 03, 2018 12:27 am
Forum: Computer Chess Club: General Topics
Topic: TCEC Season 12 with Stockfish Zero aka Leela Chess Zero
Replies: 42
Views: 8600

Re: TCEC Season 12 with Stockfish Zero aka Leela Chess Zero

With the current smallish network, you'd actually need at least a couple really expensive GPUs to match the performance the cpu-only version would get on 43 CPU cores. So, if the requirement for fairness was something like cost of hardware, it would currently be better off playing on the 43 CPU core...
by MonteCarlo
Fri Mar 30, 2018 12:40 am
Forum: Computer Chess Club: General Topics
Topic: LCZero Elo
Replies: 34
Views: 7652

Re: LCZero Elo

As Kai pointed out later in that post, his GPU is getting very, very low rollouts per second. The CPU version of Leela was much faster on his machine, and only performed about -119 rating to Zurichess. Also, that was with network id 44, which is already substantially weaker than the strongest curren...
by MonteCarlo
Wed Mar 28, 2018 8:06 pm
Forum: Computer Chess Club: General Topics
Topic: GM Caruana won the candidates! Got a shot for World Crown!
Replies: 8
Views: 2112

Re: GM Caruana won the candidates! Got a shot for World Crow

Yeah, Fabiano lived for the first 12 or 13 (can't remember which offhand) years of his life in the US before his family moved to Europe for the greater chess opportunities it afforded. If I remember correctly, even when he played for Italy he lived elsewhere in Europe (Spain and Hungary, maybe?). He...
by MonteCarlo
Fri Mar 23, 2018 3:53 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero update
Replies: 266
Views: 59747

Re: LCZero update

Yeah, it really needs a decent amount of time to avoid getting completely confused. I decided to put up with the delays of slow mode at play.lczero.org (there is candidates to watch during the delay :) ), and this was the game: https://lichess.org/8idDxNek I didn't even attempt to play correct chess...