Leela Chess Zero
@LeelaChessZero
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An official account for updates on the open source AI learning how to play chess
A server, somewhere
Joined March 2018
We're ecstatic to see our open data powering so many strong engines. In the latest CCRL Blitz list alone, at least 20 of the top 80 are 'guilty' of using it, according to this site [. We sincerely hope this number grows!.
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New blog post: EngineBattle, a comprehensive tool for streaming, testing, and analyzing Lc0 and other chess engines:
lczero.org
The chess engine development community has always needed powerful tools to test, analyze, and compare engine performance. EngineBattle offers a comprehensive solution specifically designed with...
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RT @chessdom: Hikaru Nakamura scored 12,5% vs LeelaKnightOdds, much better than other top GMs against the same version 💥 players in the Wor….
chessdom.com
Grandmaster Hikaru Nakamura played against the winner of TCEC Swiss 7 Leela Chess Zero a promo match with knight odds. “Like every game it’s the same thing. It’s like I think I’m okay and then I’m...
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Follow the FIDE Women’s World Chess Championship 2025 with our live analysis: You saw similar analysis at the WWC 2024! The analysis directly shows win/draw/loss probabilities instead of just centipawns.
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RT @mustreader: Here’s the video of me playing vs Leela with different kinds of piece odds. Check it out - very instructive stuff! https://….
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RT @GMNeiksans: With all the hype with playing the Leela engine with queens odds, I decided to give it a try. With the time control of 3+1….
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RT @IvanVendrov: want to feel, on a gut level, what it's like to interact with AI optimized to exploit your blind spots? try playing chess….
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RT @rSanti97: For the past week I have been grinding against this bot and let me just say. It is extremely unnerving.
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RT @karlsonp: @LeelaChessZero Think you can beat Leela without a queen? Here is a public leaderboard of the best humans that tried:.https:/….
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Our Lichess odds bots just got a specialized contempt search update making them even tougher to beat. Challenge them now:
lichess.org
BOT LeelaRookOdds played 62869 games since Feb 28, 2024.
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LeelaKnightOdds vs. GM Joel Benjamin, former multiple US champion, in a classical time control (60'+30") knight odds match. January 25-27. Lichess: Commentary by GM Sadler: More details in our blog post:
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RT @gmmds: There’s been quite a bit of chess today, but if you fancy some more then look no further than the Leela Knight Odds - Awonder Li….
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RT @lichess: Did you know that anyone can use Lichess broadcasts to stream our broadcast games on their own website, just like in Lc0's wor….
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We won't adjust win/draw/loss probabilities by player ratings and the clock at for tomorrow's game, as some people suggested. This also keeps Lc0 from losing the last move's thinking with a new move. Let us know which you prefer!.
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As we mentioned, we'll have live annotations of the World Chess Championship 2024 games at Check out our blog post for more details:
lczero.org
We are excited to announce the launch of https://live.lczero.org/ for the upcoming World Chess Championship 2024 between Ding Liren and Gukesh Dommaraju. On this site, you’ll be able to follow...
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We're excited to bring you a live annotation of the upcoming 2024 World Chess Championship at But first, enjoy our real-time annotation of the FRC match between Carlsen and Caruana happening now!.
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Join us today, Nov 17 from 4-6pm UTC for an Queen Odds match between Leela & chess streamer CM David Maycock on Lichess (LeelaQueenOdds vs Respectful_Dave)! 20 games + possible bonus round. More info:
lczero.org
We’re excited to announce a queen odds exhibition bullet match between Leela and chess streamer CM David Maycock aka RespectfulDave. Sunday November 17, 4-6pm UTC Match will be played on Lichess...
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The Leela Chess Zero team decided to withdraw from participating in the WCCC, as we believe the competition did an unsatisfactory job in evaluating compliance with participant rules. More details here:
lczero.org
The WCCC organizers allowed a clone, ShashChess, to participate as a proxy for Stockfish (that didn’t enter), which we find disrespectful. Consequently, we are withdrawing from the competition.
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The match is starting, and @gmmds is going to comment it on his youtube channel.
Join me tomorrow from about 13:00 UTC / 13:00 UK time / 14:00 CET on for the Leela - GM David Navara knight odds match hosted by @lichess The match starts at 14:00 UTC and I’ll spend some time before looking at some examples of Leela’s knight odds play!.
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