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stockfish-socket-server

Simple WebSocket server for running Stockfish chess engine on a remote machine.

Quickstart with Docker

Using the docker-compose.yml file:

$ docker compose up -d

Or running manually:

$ docker run \
    -d -p 5000:5000 \
    --entrypoint=/bin/bash \
    ghcr.io/x64squared/stockfish-socket-server \
    /stockfish-socket-server/start_server.sh

Starting the server manually

  1. Install requirements through pip (recommended with a virtual environment):
$ cd stockfish-socket-server
$ pip install -r requirements.txt
  1. Start the server with gunicorn (recommended options from start_server.sh):
$ gunicorn \
    --bind 0.0.0.0:5000 \
    -w 4 \
    -t 8 \
    --timeout 0 \
    'run:create_app(stockfish_path="/usr/local/bin/stockfish")'

Connecting to the server

Connect with wscat

To quickly test the server connection with wscat:

$ wscat --connect ws://127.0.0.1:5000/senduci
Connected (press CTRL+C to quit)
< Stockfish 16.1 by the Stockfish developers (see AUTHORS file)
> isready
< readyok
>

Connect with stockfish-socket-client

stockfish-socket-client can be used to connect to the server; an example of using the client in command line mode:

$ stockfish-socket-client
Stockfish 16.1 by the Stockfish developers (see AUTHORS file)
isready
readyok
position startpos moves e2e4 e7e5
go depth 5
info string NNUE evaluation using nn-6877cd24400e.nnue enabled
info depth 1 seldepth 1 multipv 1 score cp 41 nodes 32 nps 32000 tbhits 0 time 1 pv g1f3
info depth 2 seldepth 2 multipv 1 score cp 164 nodes 63 nps 63000 tbhits 0 time 1 pv g1f3 a7a6 f3e5
info depth 3 seldepth 3 multipv 1 score cp 148 nodes 139 nps 139000 tbhits 0 time 1 pv d1h5 a7a6 h5e5 g8e7
info depth 4 seldepth 4 multipv 1 score cp 148 nodes 214 nps 107000 tbhits 0 time 2 pv d1h5 a7a6 h5e5 g8e7
info depth 5 seldepth 5 multipv 1 score cp 75 nodes 1308 nps 436000 tbhits 0 time 3 pv g1f3 g8f6 d2d4 f6e4
bestmove g1f3 ponder g8f6

The client runs exactly like a local instance of stockfish, and therefore integrates with any UCI-compatible chess GUI program. More usage information can be found in the client README file.