@loloof64/react-native-stockfish

Use stockfish chess engine in your React Native application.

Installation

npm install @loloof64/react-native-stockfish

Usage

import {
  stockfishLoop,
  sendCommandToStockfish,
  subscribeToStockfishOutput,
  subscribeToStockfishError,
  stopStockfish,
} from '@loloof64/react-native-stockfish';

// ...

stockfishLoop();

// ...

useEffect(() => {
  const unsubscribe = subscribeToStockfishOutput((output) => {
    console.log('Stockfish Output:', output);
  });

  return () => unsubscribe();
}, []);

useEffect(() => {
  const unsubscribe = subscribeToStockfishError((error) => {
    console.log('Stockfish Error:', error);
  });

  return () => unsubscribe();
}, []);

// ...

sendCommandToStockfish('go movetime 1000');

// ...

stopStockfish();

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

Changing Stockfish source files

If you need to upgrade Stockfish source files, create a folder stockfish inside cpp folder, copy the src folder from the stockfish sources into the new stockfish folder. Also you need to make some more adaptive works :

Adapting streams

• copy the cpp/fixes folder inside the cpp/stockfish folder

• replace all calls to cout << #SomeContent# << endl by fakeout << #SomeContent# << fakeendl (And ajust also calls to cout.rdbuf() by fakeout.rdbuf()) But do not replace calls to sync_cout.

• copy folder cpp/fixes inside the stockfish folder

• add include to ../fixes/fixes.h in all related files (and adjust the include path accordingly)

• proceed accordingly for cin : replace by fakein

• and the same for cerr: replace by fakeerr

• in misc.h replace

#define sync_cout std::cout << IO_LOCK
#define sync_endl std::endl << IO_UNLOCK

with

#define sync_cout fakeout << IO_LOCK
#define sync_endl fakeendl << IO_UNLOCK

and include ../../fixes/fixes.h

Adapting NNUE

In file CMakeLists.txt replace the names of big and small NNUE by the ones you can find in file cpp/stockfish/src/evaluate.h. Also replace those values in the file loloof64-react-native-stockfish.podspec.

License

MIT

Made with create-react-native-library

Credits

Using sources of Stockfish 17.