Questions tagged [leela]

Related to the chess engine Leela, also known as Lc0 or Leela Chess Zero, an open-source adaptation of Deep Mind's AlphaZero.

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Using Freeware AI and Dynamically Generated Endgame Tablebases [closed]

The purpose of this query is to discuss a topic that I am totally ignorant of, rather than pose one specific question. Although such a query does invite opinions based on intuition, I am also ...
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1answer
115 views

Is there Python code to use the Leela neural network?

I am interested in doing some analyses of chess games using the neural network trained for Lc0. To that end I need to be able to turn PGN into the right kind of input vectors and to load and use the ...
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1answer
464 views

Why is Leela better than Leelenstein? (as of January 2020)

Leela Chess Zero is a neural-network based chess engine trained entirely from self play (that's why it has the word "zero" in its name). Leelenstein uses the same binary,* but a different method to ...
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How to reduce the number of playouts on LeelaChessZero?

So after checking the wiki it seems the parameter "--playouts" allows to chose the number of playouts. But when I try it on my laptop it just fails: $ ./lc0 -w meangirl-7.pb.gz --playouts 5 v0.23....
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3answers
4k views

Why is Leela so good at beating Stockfish in the French/Caro-Kann?

I notice Lc0 is especially good against Stockfish in French / Caro-Kann pawn structures. However, I don't understand why. Here're a couple of games where Leela smoothly outplays Stockfish. Can anyone ...
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2answers
171 views

Is it possible to combine CPU and GPU engines to use the other's principal variation?

This is a speculative question since I don't know if such an engine is even plausible. The idea: we'll start Stockfish and Leela at the same time using both my CPU and GPU. Within a fraction of a ...
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1answer
167 views

Lc0 gets slower if weight file gets bigger

I have two weight files, one with a size of 6MB and the other 45MB (files is listed here). The problem is that when I start to compute a move, it takes too much time, especially when I use the larger ...
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1answer
126 views

Leela Chess PUCT Mechanism

How do we know w_i which is not possible to calculate using the tree search only? From the lc0 slide, w_i is equal to summation of subtree of V ? How is this equivalent to winning ?
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1answer
883 views

Leela chess zero weight files

I'm using Leela chess zero for a couple of days and found a couple of weight files here. But what is the place to be for weight files? I can imagine that lc0's strength is determined by the weight ...
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1answer
104 views

Enable pondering with Leela chess zero

I just got Leela Chess Zero up and running inside docker using this guide. Added a couple of weights from here Now, when I run leela $> lczero -w path/to/weight/file go info depth 16 nodes 435 ...
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2answers
675 views

Leela Chess Zero - UCI engine

What is current use status of Leela for practical player? Is it already working well as UCI? Could anybody give some insight on strength with various thinking times, especially in analysis mode? As ...
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2answers
1k views

Can an Irwin Cheat Detector catch a user who is using a Leela chess bot for cheating?

I’m a big fan of chess cheat detection apps, like Irwin that was created by lichess.org. But I heard that there is a new bot called Leela that is teaching herself how to play chess, and to think in a ...
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3answers
3k views

Why are Leela's fans so passionate? [closed]

The neural-network engine Leela is a relatively new one. It's also got some extremely passionate fans. For example they write things like this: Wait 5-6 months, and we will see SF8 on uber-duper ...
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2k views

Alpha Zero vs Lc0 - time for self-play

Alpha Zero defeated Stockfish after only 9 hours of self-play. On the other hand, Lc0, has been training for several months and while attaining impressive strength (to say the least...) it's still not ...