Win on stuck sheep

public/index.html

@@ -408,18 +408,13 @@
 
         function updateHistory(newState, forceJump = false) {
             const isAtEnd = historyIndex === history.length - 1;
-
             if (newState.moveCount === 0) {
                 history = [JSON.parse(JSON.stringify(newState))];
             } else if (!state || newState.moveCount > state.moveCount) {
                 history.push(JSON.parse(JSON.stringify(newState)));
             }
-
             state = newState;
-            // Only jump the view to the latest state if the player was already at the end or if forced (like on restart)
-            if (isAtEnd || forceJump) {
-                historyIndex = history.length - 1;
-            }
+            if (isAtEnd || forceJump) historyIndex = history.length - 1;
             render();
         }
 
@@ -427,7 +422,6 @@
             if (isLocal) return initLocalState();
             const protocol = location.protocol === "https:" ? "wss" : "ws";
             ws = new WebSocket(`${protocol}://${location.host}?room=${roomId}&sessionId=${sessionId}`);
-
             ws.onopen = () => document.getElementById("dot").classList.add("conn-online");
             ws.onmessage = e => {
                 const msg = JSON.parse(e.data);
@@ -447,27 +441,16 @@
             };
         }
 
-        // Keyboard controls for Navigation
         window.addEventListener("keydown", (e) => {
             if (history.length === 0) return;
-
             switch (e.key) {
-                case "ArrowLeft":
-                    if (historyIndex > 0) historyIndex--;
-                    break;
-                case "ArrowRight":
-                    if (historyIndex < history.length - 1) historyIndex++;
-                    break;
-                case "ArrowUp": // Jump to Present
-                    historyIndex = history.length - 1;
-                    break;
-                case "ArrowDown": // Jump to Start
-                    historyIndex = 0;
-                    break;
-                default:
-                    return; // Exit if other key
+                case "ArrowLeft": if (historyIndex > 0) historyIndex--; break;
+                case "ArrowRight": if (historyIndex < history.length - 1) historyIndex++; break;
+                case "ArrowUp": historyIndex = history.length - 1; break;
+                case "ArrowDown": historyIndex = 0; break;
+                default: return;
             }
-            selected = null; // Clear selection when moving through time
+            selected = null;
             render();
         });
 
@@ -482,24 +465,33 @@
 
             nextState.moveCount++;
             nextState.winner = checkWinConditions(nextState);
-
-            // Branch history
             history = history.slice(0, historyIndex + 1);
             updateHistory(nextState, true);
         }
 
         function checkWinConditions(g) {
+            // 1. Wolf reaches sheep starting line (Row 0)
             if (g.wolf === 0) return "wolf";
+
+            // 2. Max moves reached
             if (g.moveCount >= 40) return "wolf";
+
+            // 3. Wolf is trapped
             const canWolfMove = bWolf[g.wolf].some(to => !g.sheep.includes(to));
             if (!canWolfMove) return "sheep";
+
+            // 4. Sheep are trapped (Wolf wins)
+            const canAnySheepMove = g.sheep.some(sPos => {
+                return bSheep[sPos].some(to => to !== g.wolf && !g.sheep.includes(to));
+            });
+            if (!canAnySheepMove) return "wolf";
+
             return null;
         }
 
         function render() {
             const viewState = history[historyIndex];
             if (!viewState) return;
-
             const isViewingHistory = historyIndex < history.length - 1;
             const svg = document.querySelector("svg");
             svg.innerHTML = "";
@@ -541,7 +533,6 @@
                 const isSheep = viewState.sheep.includes(i);
                 const type = isWolf ? "wolf" : (isSheep ? "sheep" : "empty");
                 const isWinnerPiece = (viewState.winner === "wolf" && isWolf) || (viewState.winner === "sheep" && isSheep);
-
                 const canInteract = isLocal || (!isViewingHistory && state.turn === myRole);
                 const isPossible = canInteract && selected !== null && (viewState.turn === "wolf" ? bWolf[selected] : bSheep[selected]).includes(i) && !isWolf && !isSheep;
 
@@ -549,7 +540,6 @@
                 g.onclick = () => {
                     if (viewState.winner || (!isLocal && isViewingHistory)) return;
                     if (!isLocal && state.turn !== myRole) return;
-
                     const isMine = (viewState.turn === "wolf" && isWolf) || (viewState.turn === "sheep" && isSheep);
                     if (isMine) selected = i;
                     else if (isPossible) {