stockfish wasms for use in lichess.org web analysis

# Example: Clean and make all web targets

./build.py all clean

use --flags to override the default emcc flags which are -O3 -DNDEBUG --closure=1. use --node to target the node runtime.

check ./build.py --help for the latest targets

to avoid installing or changing your emscripten version, use ./build-with-docker.sh or ./build-with-podman.sh:

# Example: Docker clean and make all node targets as debug with SAFE_HEAP

./build-with-docker.sh --flags='-O0 -g3 -sSAFE_HEAP' --node all clean

./build.py downloads sources to the ./fishes folder then applies diffs from the ./patches folder. Edit the Stockfish sources within ./fishes. Contribute your edits via patch file

# Example: Update `sf16-7.patch` with your source changes:

  cd fishes/sf16-7
  git diff > ../../patches/sf16-7.patch

./build.py --node
node ./src/wasm-cli.js ./sf171-79.js

Now you'll have to load the nnues. (see ./src/wasm-cli.js)

big nn-1c0000000000.nnue
small nn-37f18f62d772.nnue

The specific file names might change, so check the output of uci for the correct names.

• repo: https://github.com/linrock/Stockfish
• commit: c97f5cb
• nnue: nn-ecb35f70ff2a.nnue

• repo: https://github.com/official-stockfish/Stockfish
• commit: 68e1e9b
• tag: sf_16
• nnue: nn-5af11540bbfe.nnue

• repo: https://github.com/official-stockfish/Stockfish
• commit: 03e2748
• tag: sf_17.1
• big nnue: nn-1111cefa1111.nnue
• small nnue: nn-37f18f62d772.nnue

• repo: https://github.com/fairy-stockfish/Fairy-Stockfish
• commit: a621470
• nnues: see repo links