https://github.com/foo123/sunfish.js

JavaScript port of Sunfish Python Chess Engine
https://github.com/foo123/sunfish.js

chess-engine sunfish

Last synced: 6 days ago
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JavaScript port of Sunfish Python Chess Engine

• Host: GitHub
• URL: https://github.com/foo123/sunfish.js
• Owner: foo123
• License: gpl-3.0
• Created: 2024-09-18T09:44:23.000Z (about 2 months ago)
• Default Branch: master
• Last Pushed: 2024-11-05T10:38:45.000Z (8 days ago)
• Last Synced: 2024-11-05T11:42:06.119Z (8 days ago)
• Topics: chess-engine, sunfish
• Language: JavaScript
• Homepage: https://foo123.github.io/examples/chess-play/
• Size: 231 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# sunfish.js

JavaScript port of [Sunfish Python Chess Engine](https://github.com/thomasahle/sunfish)

**Example for node:**

```javascript

const sunfish = require('./sunfish.js');

function runCMD(cmd)

{

    sunfish.engine(cmd, (output) => console.log(output));

}

runCMD('uci');

runCMD('isready');

runCMD('position startpos moves e2e4');

runCMD('go depth 4');

```

**Example for browser ran in web worker:**

```javascript

const sunfish = {engine: new Worker('./sunfish.js')};

function runCMD(cmd)

{

    sunfish.engine.postMessage(cmd);

}

sunfish.engine.onmessage = function(evt) {

    console.log(evt && evt.data ? evt.data : evt);

};

runCMD('uci');

runCMD('isready');

runCMD('position startpos moves e2e4');

runCMD('go depth 4');

```

**Output:**

```text

id name sunfish 2023

uciok

readyok

bestmove e7e5

```

**NNUE example for node:**

* Transform the **NNUE** model pickle from sunfish repo to JSON using the `nnue/nnue-pickle-to-json.py` tool (here `tanh.pickle` NNUE model is used).

```javascript

const sunfish_nnue = require('./sunfish_nnue.js');

// NNUE json model

sunfish_nnue.nnue(JSON.parse(require('fs').readFileSync(require('path').join(__dirname, './nnue/models/tanh.json'))));

function runCMD(cmd)

{

    sunfish_nnue.engine(cmd, (output) => console.log(output));

}

runCMD('uci');

runCMD('isready');

runCMD('position startpos moves e2e4');

runCMD('go depth 4 wtime 10000 btime 10000');

```

**Output:**

```text

id name sunfish nnue

uciok

readyok

bestmove d7d5

```

**NNUE example for browser ran in web worker:**

* Transform the **NNUE** model pickle from sunfish repo to JSON using the `nnue/nnue-pickle-to-json.py` tool (here `tanh.pickle` NNUE model is used).

```javascript

const sunfish_nnue = {engine: new Worker('./sunfish_nnue.js')};

const NNUE_JSON = {/*..*/}; // JSON of NNUE model

function loadNNUE(nnue_json)

{

    // string form of JSON needs to be sent

    sunfish_nnue.engine.postMessage({nnue:"string" === typeof nnue_json ? nnue_json : JSON.stringify(nnue_json)});

}

function runCMD(cmd)

{

    sunfish_nnue.engine.postMessage(cmd);

}

sunfish_nnue.engine.onmessage = function(evt) {

    console.log(evt && evt.data ? evt.data : evt);

};

loadNNUE(NNUE_JSON);

runCMD('uci');

runCMD('isready');

runCMD('position startpos moves e2e4');

runCMD('go depth 4');

```

**Output:**

```text

nnueok

id name sunfish nnue

uciok

readyok

bestmove d7d5

```