Participate in building the best Chess AI

Step by step instructions on how to participate in building the best Chess AI (Leela Chess). Requirements: A machine with (hardware support for) OpenCL 1.1 or higher.

At the time of writing this, only the precomplied client worked on Debian 9.4. Running a locally built client failed on failed with:

./client_linux: line 1: syntax error near unexpected token `newline'
./client_linux: line 1: `!<arch>'

Install a precompiled client

Download the latest version of client_linux from https://github.com/glinscott/leela-chess/releases. Make sure the file is executable, e.g.

chmod 755 client_linux

If you really want to compile your own client, the see here

Install and compile leela-chess

Install build requirements of leela-chess. Note that if you already have a working installation of opencl, don't install opencl packages, eg. ocl-icd-libopencl1 conflicts with nvidia-libopencl1-dev.

cd ~/
sudo apt-get install git-all cmake libboost-all-dev libopenblas-dev opencl-headers zlib1g-dev ocl-icd-libopencl1 ocl-icd-opencl-dev

Install the source code of leela-chess.

git clone https://github.com/glinscott/leela-chess.git
cd leela-chess
git submodule update --init --recursive
mkdir build && cd build
cmake ..

If you have installed custom libraries, i.e. the non-free library CUDA in /usr/local/cuda/include, then you will have to patch all make-files which use the argument "-isystem" and replace that string with "-I".

find CMakeFiles -type f -exec sed -i 's/-isystem /-I/g' "{}" +

make will somehow, magically restore the old state!

grep -R isystem CMakeFiles

CMakeFiles/objs.dir/flags.make
CMakeFiles/lczero.dir/flags.make
CMakeFiles/tests.dir/flags.make

Build leela-chess

make

Put the newly built binary in the same directory as the client.

If you have downloaded a precompiled client, then just make a directory and put both files there. If you built the client locally, then something like this should work.

cp lczero ~/go/src/github.com/Tilps/chess/
cd ~/go/src/github.com/Tilps/chess/

Run leela-chess (generate training games)

Execute the client, it will automatically start leela-chess.

./client_linux

Appendix

Compile your own client (not recommended)

Install the GO programming language.

sudo apt-get install golang-1.10
export GOROOT=/usr/lib/go-1.10/
export GOPATH=${HOME}/go
mkdir -p ${GOPATH}/src
PATH=/usr/lib/go-1.10/bin:$PATH

Get two packages required by lczero-client.

go get -u github.com/Tilps/chess
go get -u github.com/nightlyone/lockfile

Get the client.

mkdir -p ~/src
cd ~/src
git clone git@github.com:leelachesszero/lczero-client.git

Build the client.

cd ~/src/lczero-client
git pull
export GOPATH=${HOME}/go:${HOME}/src/lczero-client
go build lc0_main.go

Upgrading the client

export GOPATH=${HOME}/go:${HOME}/src/lczero-client

That's all for the client, now let's install and compile leela-chess.

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Last modified: juli 3, 2019