Leela Chess Zero

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Leela Chess Zero, (LCZero, lc0)
an adaption of Gian-Carlo Pascutto's Leela Zero Go project [1] to Chess, using Stockfish's board representation and move generation. No heuristics or prior knowledge are carried over from Stockfish. Leela Chess is open source, released under the terms of GPL version 3 or later, and supports UCI.

The goal is to build a strong UCT chess AI following the same type of deep learning techniques of AlphaZero as described in DeepMind's paper [2], but using distributed training for the weights of the deep residual convolutional neural network. The training process requires CUDA and a GPU accelerated version of Tensorflow installed [3].


Soon after the start of the project, some of the team led by Alexander Lyashuk started to rewrite the engine from scratch. The new engine dubbed lc0 was able to search 4-8 times faster than lczero on Nvidia GPU’s [4]. Training has changed to require lc0 instead of lczero [5].

See also


Forum Posts

Re: Announcing lczero by Daniel Shawul, CCC, January 21, 2018 » Rollout Paradigm
LCZero update (2) by Rein Halbersma, CCC, March 25, 2018
Re: TCEC season 13, 2 NN engines will be participating, Leela and Deus X by Gian-Carlo Pascutto, CCC, August 03, 2018
Re: Has Silver written any code for "his" ZeusX? by Alexander Lyashuk, LCZero Forum, August 02, 2018

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