2f:T40b,async function ask(stockfish, command, params="") { let resolve, idx = ("0000" + trigger).slice(-4), message = command + " " + params, promise = new Promise(r => resolve = r), waitfor = ({ 'go': 'bestmove', 'eval': 'eval', 'uci': 'uciok', 'isready': 'readyok', 'position': 'NOP', 'ucinewgame': 'NOP', 'd': 'Legal' })[command] ; stockfish.onmessage = e => { console.log( e.data ); if (e.data.includes(waitfor)) { messages.push(idx + ' <== ' + e.data, ''); mutable trigger += 1; resolve(e.data); } else { messages.push(idx + ' ' + e.data); } } ; if (!waitfor) throw new Error("command not available", command); console.log( message ); messages.push(idx + ' ==> ' + message); (waitfor === 'NOP') && messages.push(''); mutable trigger += 1; stockfish.postMessage( message ); return promise; }30:[] 2d:{"title":"Hello, Stockfish","cells":[{"id":0,"value":"md`# Hello, Stockfish\n\nSaying hello to the [Stockfish chess engine](https://github.com/nmrugg/stockfish.js). Stockfish uses a Web Worker, so to get around cross-origin restrictions, the script is first fetched.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":25,"value":"md` \nuci protocal: http://wbec-ridderkerk.nl/html/UCIProtocol.html \nmore uci: https://www.chessprogramming.org/UCI \nsf interface: https://gist.github.com/aliostad/f4470274f39d29b788c1b09519e67372 \n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":5,"value":"stockfish = {\n // const importObject = { env: { memory: new WebAssembly.Memory({ initial: 256 }) } };\n const workerScript = await require.resolve(\"stockfish@11/src/stockfish.asm.js\")\n .then(fetch)\n // .then(response => response.arrayBuffer())\n // .then(response => response.text())\n // .then(bytes => WebAssembly.instantiate(bytes, importObject))\n .then(response => response.blob())\n .then(blob => URL.createObjectURL(blob, {type: \"text/javascript\"})) \n ;\n \n return new Worker(workerScript);\n // return workerScript\n\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":14,"value":"$2f","pinned":true,"hidden":false,"mode":"ojs"},{"id":274,"value":"mutable messages = [];","pinned":false,"hidden":false,"mode":"ojs"},{"id":276,"value":"mutable trigger = 0;","pinned":false,"hidden":false,"mode":"ojs"},{"id":123,"value":"{ trigger; return html`

${ messages.slice(-30).map( v => `${v}
` ) }

`}","pinned":true,"hidden":false,"mode":"ojs"},{"id":476,"value":"","pinned":true,"hidden":false,"mode":"ojs"},{"id":334,"value":"{\n const btnReady = html``;\n btnReady.onclick = () => ask(stockfish, \"isready\");\n const Eval = html``;\n Eval.onclick = () => ask(stockfish, \"eval\");\n\n const btnUCI = html``;\n btnUCI.onclick = () => ask(stockfish, \"uci\");\n\n const btnGO = html``;\n btnGO.onclick = () => ask(stockfish, \"go\", \"depth 3\");\n \n const btnNewGame = html``;\n btnNewGame.onclick = () => ask(stockfish, \"ucinewgame\");\n \n const btnFen = html``;\n btnFen.onclick = () => ask(stockfish, \"position\", \"fen \" + fens[1]);\n \n const btnDisplay = html``;\n btnDisplay.onclick = () => ask(stockfish, \"d\");\n \n return html`${btnReady} ${Eval} ${btnUCI} ${btnNewGame} ${btnFen} ${btnGO} ${btnDisplay} `;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":415,"value":"fens = [\n 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1',\n 'N7/P3pk1p/3p2p1/r4p2/8/4b2B/4P1KP/1R6 w - - 0 34',\n '7K/8/k1P5/7p/8/8/8/8'\n];","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W30","stdlib":"1","titling":"auto"}