Lc0: Enjoy the Ultimate Chess Experience with Leela Chess Zero on Android
How to Download and Play Leela Chess Zero on Android
If you are a chess enthusiast who wants to challenge yourself against a powerful and innovative chess engine, you might want to try Leela Chess Zero on your Android device. Leela Chess Zero is a free, open-source, and neural network-based chess engine that can play at a superhuman level. In this article, we will show you how to download and play Leela Chess Zero on Android, and what are the advantages of using this engine.
What is Leela Chess Zero?
A brief introduction to the project and its features
Leela Chess Zero (abbreviated as LCZero or lc0) is a volunteer computing project that aims to create a strong chess engine that learns from self-play. It is inspired by AlphaZero, a deep learning system that mastered chess, shogi, and Go without any human knowledge. Leela Chess Zero uses a similar approach, but it is open-source and anyone can contribute to its development.
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Leela Chess Zero has several features that make it unique and interesting. Some of them are:
It uses a deep neural network to evaluate positions and moves, instead of a handcrafted evaluation function.
It learns from its own games, without any human intervention or guidance.
It improves over time, as more games are played and more data is collected.
It can play different styles of chess, depending on the network and the parameters used.
It can run on various hardware platforms, including CPUs, GPUs, and TPUs.
The benefits of playing with a neural network-based chess engine
Playing with Leela Chess Zero can offer you many benefits as a chess player. Some of them are:
You can test your skills against a very strong opponent, that can reach an Elo rating of over 3000.
You can learn from its moves and strategies, that are often unconventional and creative.
You can explore different variations and scenarios, that are not covered by traditional engines.
You can have fun and enjoy the beauty of chess, as Leela Chess Zero plays with flair and elegance.
How to Download Leela Chess Zero on Android
The official APK package and the supported chess apps
The easiest way to download and play Leela Chess Zero on Android is to use the official APK package that is available on the project's website. The APK package contains the lc0 engine, a default network file, and a training client (if you want to contribute games). You can get it from here:
After installing the APK package, you will need a chess app that supports the Open Exchange protocol, which allows you to use external engines. Some of the chess apps that support this protocol are:
D The plain engine binaries and the required weights file
Another way to download and play Leela Chess Zero on Android is to use the plain engine binaries that are also available on the project's website. The plain engine binaries are the executable files of the lc0 engine, without any network file or training client. You can get them from here:
After downloading the plain engine binaries, you will need to download a network file separately, which is the file that contains the neural network weights. The network file is essential for the lc0 engine to work, as it determines how the engine evaluates positions and moves. You can get the network file from here:
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You will need to choose a network file that matches your device's architecture and capabilities. For example, if your device has a 64-bit ARM processor and a GPU, you can use a network file that has "arm64" and "cuda" in its name. You can also choose a network file that has a different size or format, depending on your preference and performance.
After downloading the network file, you will need to place it in the same folder as the plain engine binary, and rename it to "weights.pb.gz". Then, you will need a chess app that supports the UCI protocol, which allows you to use external engines. Some of the chess apps that support this protocol are:
The unofficial builds for different architectures and embedded weights
A third way to download and play Leela Chess Zero on Android is to use the unofficial builds that are provided by some of the project's contributors. The unofficial builds are customized versions of the lc0 engine, that have different architectures and embedded weights. You can get them from here:
The unofficial builds have some advantages and disadvantages over the official ones. Some of them are:
They are easier to install and use, as they do not require a separate network file or a specific chess app.
They are optimized for different devices and platforms, such as Android TV, Chrome OS, or Raspberry Pi.
They have different network sizes and formats, such as 10x128, 20x256, or FP16.
They may not be updated regularly or compatible with the latest versions of the lc0 engine.
How to Play Leela Chess Zero on Android
How to choose the right engine and network for your device
Before you start playing with Leela Chess Zero on Android, you need to choose the right engine and network for your device. This will ensure that you get the best performance and experience possible. Here are some tips on how to do that:
They may not be verified or endorsed by the project's developers or community.
Check your device's specifications, such as its processor type, memory size, and GPU model.
Choose an engine binary that matches your device's architecture, such as armv7, arm64, or x86_64.
Choose a network file that matches your device's capabilities, such as cuda, opencl, or blas.
Choose a network size and format that suits your preference and performance, such as 10x128.pb.gz, 20x256.pb.gz, or 40x512.pb.gz.
How to adjust the settings and options for optimal performance
After you choose the right engine and network for your device, you need to adjust the settings and options for optimal performance. This will ensure that you get the most out of Leela Chess Zero on Android. Here are some tips on how to do that:
Test different combinations of engines and networks until you find the one that works best for you.
Set the number of threads to match your device's CPU cores, or lower if you want to save battery life.
Set the move overhead to a higher value if you want to