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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Understanding Leela Chess Zero (Lc0) "verbose-move-stats output"

I'm trying to fully understand the Leela's verbose-move-stats output: Are the statements below correct? The move that will be played is e2e4, since it's the one with the greatest count of visits (N: ...
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5 votes
4 answers
414 views

Where was Stockfish's fatal mistake in this game against Leela?

This is a game from the TCEC Season 18 superfinal, which Leela won with a beautiful positional bind. [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"] [Event "TCEC Season ...
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2 votes
1 answer
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How to measure Leela Chess Zero improvement

I searched Leela website for some statistics about its self-training, the number of games it played with itself in order to assess its progress or to be able to predict whether it is going to win the ...
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5 votes
1 answer
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Can I download early versions of Leela chess zero?

I want to play weaker versions of Leela. It would be good to play some really early versions of the net. Is there a repository available where I can download them?
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3 votes
2 answers
597 views

Which engine is better at Chess960-Stockfish or Leela?

It seems that TCEC has seen Stockfish and Leela go back and forth. It is probable that these days Stockfish is a little bit better than Leela. I was wondering, since it is different in Chess960, which ...
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4 votes
3 answers
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Did Leela Zero miss a win in this position?

Did Leela Zero miss a win in this position from game 106 of the Computer Chess Championship, on move 83 with White to move? [FEN "8/2p1r3/2P4k/1P1pB2p/K2NbP1R/P5r1/8/8 w - - 0 1"] Here, ...
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28 votes
8 answers
6k views

Would an ensemble of chess engines beat the best one?

In many areas such as prediction and classification, ensemble methods tend to outperform individual methods. This made me wonder if it would make sense to pick a few of the top chess engines and work ...
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4 votes
1 answer
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Help me choose hardware configuration

I am preparing to buy a new desktop computer. I would like to use it for chess analysis with both StockFish and Lc0. My budget is slightly above 2K euros. QUESTIONS: This is my first time ...
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4 votes
1 answer
266 views

Creating a New Neural Network for chess

I'd like to have my own chess engine similar to Leela for personal use. I’d want it to have a decent strength, let’s say 2k, and be able to play with it. I'm wondering if I can use Leela to create a ...
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8 votes
2 answers
1k views

Train Leela Chess against myself

Is it possible to play against a "virgin" Leela Chess engine to see how many games it takes it to beat me? That is, can I train Leela Chess by playing against it myself?
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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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2 votes
2 answers
1k 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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2 votes
1 answer
2k 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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3 votes
1 answer
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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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22 votes
3 answers
5k views

Why is Leela so good at beating Stockfish in the French/Slav?

I notice Lc0 is especially good against Stockfish in French / Slav 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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5 votes
2 answers
680 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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2 votes
1 answer
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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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5 votes
1 answer
209 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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2 votes
1 answer
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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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0 votes
1 answer
220 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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5 votes
2 answers
1k 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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16 votes
2 answers
2k 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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  • 291
7 votes
3 answers
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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6 votes
2 answers
4k 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 ...
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