Lc0 – Leela Chess Zero – neural network based chess engine

Leela Chess Zero (Lc0) is a neural network based chess engine.

Lc0, like most other chess engines, implements the Universal Chess Interface (UCI) protocol and requires a chess GUI.

This is free and open source software.

To have a trained network, you need to think about three aspects:

  • Network structure.
  • Training data.
  • Training procedure.

Network structure defines:

  • Supported features (e.g., whether it is able to predict probability of Win/Draw/Loss or only expected outcome).
  • Network capacity, how much it is able to “know” in the end.
  • Generally, larger networks have better capacity, but slower to use and train.
  • How easy it learns (often hard to predict, but some structures learn better than others).

Network needs millions of example chess games to learn. The games have to be both very high-level for a network to learn strong moves, and contain weaker moves so that the network learns to avoid them and know how to exploit them.

When it comes to training a neural network, there is a vast space of methods and parameters to pick from, including choosing an optimizer and selecting a learning rate schedule.

Website: lczero.org
Support: Forums, GitHub Code Repository
Developer:
License: GNU General Public License v3.0

Lc0 is written in C++. Learn C++ with our recommended free books and free tutorials.

Return to Chess Engines Home Page


Popular series
Guide to LinuxNew to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux.
Free and Open Source SoftwareThe largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions.
ReviewsHundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information.
Alternatives to Proprietary SoftwareReplace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS.
DockerGetting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers.
System ToolsEssential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users.
ProductivityLinux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.
Home ComputersHome computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.
Now and ThenNow and Then examines how promising open source software fared over the years. It can be a bumpy ride.
Linux at HomeLinux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.
Linux CandyLinux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery.
Android AppsBest Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series.
Programming BooksThese best free books accelerate your learning of every programming language. Learn a new language today!
Programming TutorialsThese free tutorials offer the perfect tonic to our free programming books series.
Stars and StripesStars and Stripes is an occasional series looking at the impact of Linux in the USA.
Share this article

Share your Thoughts

This site uses Akismet to reduce spam. Learn how your comment data is processed.