1.3.0

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "vue-nonograms-solid",
-  "version": "1.0.6",
+  "version": "1.3.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "vue-nonograms-solid",
-      "version": "1.0.6",
+      "version": "1.3.0",
       "dependencies": {
         "fireworks-js": "^2.10.8",
         "flag-icons": "^7.5.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-nonograms-solid",
-  "version": "1.0.6",
+  "version": "1.3.0",
   "type": "module",
   "scripts": {
     "dev": "vite",

src/components/CustomGameModal.vue

@@ -1,13 +1,15 @@
 <script setup>
-import { ref } from 'vue';
+import { ref, computed } from 'vue';
 import { usePuzzleStore } from '@/stores/puzzle';
 import { useI18n } from '@/composables/useI18n';
+import { calculateDifficulty } from '@/utils/puzzleUtils';
 
 const emit = defineEmits(['close']);
 const store = usePuzzleStore();
 const { t } = useI18n();
 
 const customSize = ref(10);
+const fillRate = ref(50);
 const errorMsg = ref('');
 
 const snapToStep = (value, step) => {
@@ -19,6 +21,20 @@ const handleSnap = () => {
   customSize.value = snapToStep(Number(customSize.value), 5);
 };
 
+const difficultyLevel = computed(() => {
+  return calculateDifficulty(fillRate.value / 100);
+});
+
+const difficultyColor = computed(() => {
+  switch(difficultyLevel.value) {
+    case 'extreme': return '#ff3333';
+    case 'hardest': return '#ff9933';
+    case 'harder': return '#ffff33';
+    case 'easy': return '#33ff33';
+    default: return '#33ff33';
+  }
+});
+
 const confirm = () => {
   const size = parseInt(customSize.value);
   if (isNaN(size) || size < 5 || size > 80) {
@@ -26,7 +42,7 @@ const confirm = () => {
     return;
   }
   
-  store.initCustomGame(size);
+  store.initCustomGame(size, fillRate.value / 100);
   emit('close');
 };
 </script>
@@ -52,6 +68,29 @@ const confirm = () => {
           <span>80</span>
         </div>
       </div>
+
+      <p>{{ t('custom.fillRate') }}</p>
+      <div class="input-group">
+        <div class="range-value">{{ fillRate }}%</div>
+        <input 
+          type="range" 
+          v-model="fillRate" 
+          min="10" 
+          max="90"
+          step="5"
+        />
+        <div class="range-scale">
+          <span>10%</span>
+          <span>90%</span>
+        </div>
+      </div>
+
+      <div class="difficulty-indicator">
+        <span class="label">{{ t('custom.difficulty') }}:</span>
+        <span class="value" :style="{ color: difficultyColor }">
+          {{ t(`difficulty.${difficultyLevel}`) }}
+        </span>
+      </div>
       
       <p v-if="errorMsg" class="error">{{ errorMsg }}</p>
 
@@ -87,6 +126,7 @@ const confirm = () => {
   border: 1px solid var(--accent-cyan);
   box-shadow: 0 0 50px rgba(0, 242, 255, 0.2);
   animation: slideUp 0.3s ease;
+  transition: all 0.3s ease-in-out;
 }
 
 h2 {
@@ -161,6 +201,31 @@ input[type="range"]::-moz-range-thumb {
     font-size: 0.85rem;
 }
 
+.difficulty-indicator {
+    margin: 20px 0;
+    font-size: 1.2rem;
+    display: flex;
+    justify-content: center;
+    gap: 10px;
+    align-items: center;
+    white-space: nowrap;
+    height: 1.5em; /* Reserve space for one line of text */
+}
+
+.difficulty-indicator .label {
+    color: var(--text-color);
+}
+
+.difficulty-indicator .value {
+    font-weight: bold;
+    text-transform: uppercase;
+    text-shadow: 0 0 10px currentColor;
+    transition: color 0.3s ease;
+    display: inline-block;
+    min-width: 120px; /* Reserve space for longest text */
+    text-align: left;
+}
+
 .error {
     color: #ff4d4d;
     font-size: 0.9rem;

src/components/WinModal.vue

@@ -7,6 +7,7 @@ import { useTimer } from '@/composables/useTimer';
 import xIcon from '@/assets/brands/x.svg';
 import facebookIcon from '@/assets/brands/facebook.svg';
 import whatsappIcon from '@/assets/brands/whatsapp.svg';
+import { calculateDifficulty } from '@/utils/puzzleUtils';
 
 const store = usePuzzleStore();
 const { t } = useI18n();
@@ -88,8 +89,9 @@ const buildShareCanvas = () => {
   const padding = 28;
   const headerHeight = 64;
   const footerHeight = 28;
+  const infoHeight = 40; // New space for difficulty/guide info
   const width = boardSize + padding * 2;
-  const height = boardSize + padding * 2 + headerHeight + footerHeight;
+  const height = boardSize + padding * 2 + headerHeight + footerHeight + infoHeight;
   const scale = window.devicePixelRatio || 1;
   const canvas = document.createElement('canvas');
   canvas.width = width * scale;
@@ -109,6 +111,24 @@ const buildShareCanvas = () => {
   ctx.fillText(t('app.title'), padding, padding + 10);
   ctx.font = '600 16px "Segoe UI", sans-serif';
   ctx.fillText(`${t('win.time')} ${formattedTime.value}`, padding, padding + 34);
+  
+  // Difficulty & Density Info
+  const densityPercent = Math.round(store.currentDensity * 100);
+  const difficultyKey = calculateDifficulty(store.currentDensity);
+  let diffColor = '#33ff33';
+  if (difficultyKey === 'extreme') diffColor = '#ff3333';
+  else if (difficultyKey === 'hardest') diffColor = '#ff9933';
+  else if (difficultyKey === 'harder') diffColor = '#ffff33';
+  
+  const difficultyText = t(`difficulty.${difficultyKey}`);
+  ctx.font = '600 14px "Segoe UI", sans-serif';
+  
+  // Right aligned difficulty info
+  const diffLabel = `${t('win.difficulty')} ${difficultyText} (${densityPercent}%)`;
+  const diffWidth = ctx.measureText(diffLabel).width;
+  ctx.fillStyle = diffColor;
+  ctx.fillText(diffLabel, width - padding - diffWidth, padding + 34);
+
   const gridX = padding;
   const gridY = padding + headerHeight;
   ctx.fillStyle = 'rgba(255, 255, 255, 0.06)';
@@ -152,6 +172,15 @@ const buildShareCanvas = () => {
       }
     }
   }
+
+  // Guide Usage Info (Dirty Flag)
+  if (store.guideUsageCount > 0) {
+      ctx.fillStyle = '#ff4d4d';
+      ctx.font = '600 14px "Segoe UI", sans-serif';
+      const guideText = t('win.usedGuide', { count: store.guideUsageCount });
+      ctx.fillText(`⚠️ ${guideText}`, padding, height - padding - footerHeight + 10);
+  }
+
   ctx.fillStyle = 'rgba(255, 255, 255, 0.75)';
   ctx.font = '500 14px "Segoe UI", sans-serif';
   ctx.fillText(appUrl, padding, height - padding + 6);
@@ -183,7 +212,7 @@ const buildShareUrl = (target, text, url) => {
   const encodedText = encodeURIComponent(text);
   const encodedUrl = encodeURIComponent(url);
   if (target === 'x') {
-    return `https://twitter.com/intent/tweet?text=${encodedText}&url=${encodedUrl}`;
+    return `https://x.com/intent/tweet?text=${encodedText}&url=${encodedUrl}`;
   }
   if (target === 'facebook') {
     return `https://www.facebook.com/sharer/sharer.php?u=${encodedUrl}&quote=${encodedText}`;
@@ -197,29 +226,48 @@ const buildShareUrl = (target, text, url) => {
 const shareTo = async (target) => {
   if (shareInProgress.value) return;
   shareInProgress.value = true;
+  
+  const text = shareText.value;
+  const url = window.location.href;
+  const shareUrl = buildShareUrl(target, text, url);
+
   try {
-    const blob = await createShareBlob();
+    // Try native share first if available (supports images)
-    if (!blob) return;
+    if (navigator.share && navigator.canShare) {
-    const file = new File([blob], `nonogram-${store.size}x${store.size}.png`, { type: 'image/png' });
+      const blob = await createShareBlob();
-    const text = shareText.value;
+      if (blob) {
-    const url = window.location.href;
+        const file = new File([blob], `nonogram-${store.size}x${store.size}.png`, { type: 'image/png' });
-    if (navigator.share && navigator.canShare && navigator.canShare({ files: [file] })) {
+        if (navigator.canShare({ files: [file] })) {
-      await navigator.share({
+          await navigator.share({
-        files: [file],
+            files: [file],
-        text,
+            text,
-        title: t('app.title'),
+            title: t('app.title'),
-        url
+            url
-      });
+          });
-      return;
+          return;
+        }
+      }
     }
-    await downloadShareImage();
+  } catch (error) {
-    const shareUrl = buildShareUrl(target, text, url);
+    if (error.name === 'AbortError') {
-    if (shareUrl) {
+      return; // User cancelled native share, do nothing
-      window.open(shareUrl, '_blank', 'noopener');
     }
+    // Other errors -> fall through to fallback
   } finally {
     shareInProgress.value = false;
   }
+
+  // Fallback: Direct Link + Download
+  // Open window immediately if possible (though we awaited above, so it might be blocked, 
+  // but we can't do much about it if we want to try native share first).
+  // Ideally, for Desktop, navigator.share is undefined so we skip the await above.
+  
+  if (shareUrl) {
+    window.open(shareUrl, '_blank', 'noopener');
+  }
+  
+  // Trigger download as "screenshot support"
+  downloadShareImage();
 };
 
 onMounted(() => {

src/composables/useI18n.js

@@ -29,6 +29,12 @@ const messages = {
     'custom.cancel': 'Anuluj',
     'custom.start': 'Start',
     'custom.sizeError': 'Rozmiar musi być między 5 a 80!',
+    'custom.fillRate': 'Wypełnienie',
+    'custom.difficulty': 'Poziom trudności',
+    'difficulty.easy': 'Łatwy',
+    'difficulty.harder': 'Trudniejszy',
+    'difficulty.hardest': 'Najtrudniejszy',
+    'difficulty.extreme': 'Ekstremalny',
     'win.title': 'GRATULACJE!',
     'win.message': 'Rozwiązałeś zagadkę!',
     'win.time': 'Czas:',
@@ -39,6 +45,8 @@ const messages = {
     'win.shareFacebook': 'Facebook',
     'win.shareWhatsapp': 'WhatsApp',
     'win.shareDownload': 'Pobierz zrzut',
+    'win.difficulty': 'Poziom:',
+    'win.usedGuide': 'Użyto podpowiedzi: {count}',
     'pwa.installTitle': 'Zainstaluj aplikację i graj offline',
     'pwa.installMobile': 'Dodaj do ekranu głównego',
     'pwa.installDesktop': 'Zainstaluj na komputerze',
@@ -128,6 +136,12 @@ const messages = {
     'custom.cancel': 'Cancel',
     'custom.start': 'Start',
     'custom.sizeError': 'Size must be between 5 and 80!',
+    'custom.fillRate': 'Fill Rate',
+    'custom.difficulty': 'Difficulty',
+    'difficulty.easy': 'Easy',
+    'difficulty.harder': 'Harder',
+    'difficulty.hardest': 'Hardest',
+    'difficulty.extreme': 'Extreme',
     'win.title': 'CONGRATULATIONS!',
     'win.message': 'You solved the puzzle!',
     'win.time': 'Time:',
@@ -138,6 +152,8 @@ const messages = {
     'win.shareFacebook': 'Facebook',
     'win.shareWhatsapp': 'WhatsApp',
     'win.shareDownload': 'Download screenshot',
+    'win.difficulty': 'Difficulty:',
+    'win.usedGuide': 'Guide used: {count}',
     'pwa.installTitle': 'Install the app and play offline',
     'pwa.installMobile': 'Add to home screen',
     'pwa.installDesktop': 'Install on desktop',
@@ -279,9 +295,17 @@ const messages = {
     'custom.cancel': '取消',
     'custom.start': '开始',
     'custom.sizeError': '尺寸必须在 5 到 80 之间！',
+    'custom.fillRate': '填充率',
+    'custom.difficulty': '难度',
+    'difficulty.easy': '简单',
+    'difficulty.harder': '较难',
+    'difficulty.hardest': '最难',
+    'difficulty.extreme': '极限',
     'win.title': '恭喜！',
     'win.message': '你解开了谜题！',
     'win.time': '时间:',
+    'win.difficulty': '难度:',
+    'win.usedGuide': '使用指南: {count}',
     'win.playAgain': '再玩一次',
     'win.shareTitle': '分享你的结果',
     'win.shareText': '我在 {time} 内解开了 {size}x{size} 的数织！',
@@ -479,9 +503,17 @@ const messages = {
     'custom.cancel': 'Cancelar',
     'custom.start': 'Empezar',
     'custom.sizeError': '¡El tamaño debe estar entre 5 y 80!',
+    'custom.fillRate': 'Relleno',
+    'custom.difficulty': 'Dificultad',
+    'difficulty.easy': 'Fácil',
+    'difficulty.harder': 'Más difícil',
+    'difficulty.hardest': 'El más difícil',
+    'difficulty.extreme': 'Extremo',
     'win.title': '¡FELICIDADES!',
     'win.message': '¡Has resuelto el rompecabezas!',
     'win.time': 'Tiempo:',
+    'win.difficulty': 'Dificultad:',
+    'win.usedGuide': 'Guía usada: {count}',
     'win.playAgain': 'Jugar de nuevo',
     'win.shareTitle': 'Comparte tu resultado',
     'win.shareText': '¡Resolví un nonograma de {size}x{size} en {time}!',
@@ -545,9 +577,17 @@ const messages = {
     'custom.cancel': 'Annuler',
     'custom.start': 'Démarrer',
     'custom.sizeError': 'La taille doit être entre 5 et 80 !',
+    'custom.fillRate': 'Remplissage',
+    'custom.difficulty': 'Difficulté',
+    'difficulty.easy': 'Facile',
+    'difficulty.harder': 'Plus difficile',
+    'difficulty.hardest': 'Le plus difficile',
+    'difficulty.extreme': 'Extrême',
     'win.title': 'FÉLICITATIONS !',
     'win.message': 'Vous avez résolu le puzzle !',
     'win.time': 'Temps:',
+    'win.difficulty': 'Difficulté :',
+    'win.usedGuide': 'Guide utilisé : {count}',
     'win.playAgain': 'Rejouer',
     'win.shareTitle': 'Partagez votre résultat',
     'win.shareText': 'J’ai résolu un nonogramme {size}x{size} en {time} !',
@@ -611,9 +651,17 @@ const messages = {
     'custom.cancel': 'إلغاء',
     'custom.start': 'ابدأ',
     'custom.sizeError': 'يجب أن يكون الحجم بين 5 و80!',
+    'custom.fillRate': 'معدل الملء',
+    'custom.difficulty': 'الصعوبة',
+    'difficulty.easy': 'سهل',
+    'difficulty.harder': 'أصعب',
+    'difficulty.hardest': 'الأصعب',
+    'difficulty.extreme': 'أقصى',
     'win.title': 'تهانينا!',
     'win.message': 'لقد حللت اللغز!',
     'win.time': 'الوقت:',
+    'win.difficulty': 'الصعوبة:',
+    'win.usedGuide': 'تم استخدام الدليل: {count}',
     'win.playAgain': 'العب مرة أخرى',
     'win.shareTitle': 'شارك نتيجتك',
     'win.shareText': 'حللت نونوغرام {size}x{size} في {time}!',
@@ -743,9 +791,17 @@ const messages = {
     'custom.cancel': 'Отмена',
     'custom.start': 'Старт',
     'custom.sizeError': 'Размер должен быть от 5 до 80!',
+    'custom.fillRate': 'Заполнение',
+    'custom.difficulty': 'Сложность',
+    'difficulty.easy': 'Легкий',
+    'difficulty.harder': 'Сложный',
+    'difficulty.hardest': 'Очень сложный',
+    'difficulty.extreme': 'Экстремальный',
     'win.title': 'ПОЗДРАВЛЯЕМ!',
     'win.message': 'Вы решили головоломку!',
     'win.time': 'Время:',
+    'win.difficulty': 'Сложность:',
+    'win.usedGuide': 'Подсказок использовано: {count}',
     'win.playAgain': 'Сыграть снова',
     'win.shareTitle': 'Поделитесь результатом',
     'win.shareText': 'Я решил(а) нонограмму {size}x{size} за {time}!',
@@ -942,9 +998,17 @@ const messages = {
     'custom.cancel': 'Abbrechen',
     'custom.start': 'Start',
     'custom.sizeError': 'Die Größe muss zwischen 5 und 80 liegen!',
+    'custom.fillRate': 'Füllrate',
+    'custom.difficulty': 'Schwierigkeit',
+    'difficulty.easy': 'Einfach',
+    'difficulty.harder': 'Schwerer',
+    'difficulty.hardest': 'Am schwersten',
+    'difficulty.extreme': 'Extrem',
     'win.title': 'HERZLICHEN GLÜCKWUNSCH!',
     'win.message': 'Sie haben das Rätsel gelöst!',
     'win.time': 'Zeit:',
+    'win.difficulty': 'Schwierigkeit:',
+    'win.usedGuide': 'Hilfe benutzt: {count}',
     'win.playAgain': 'Erneut spielen',
     'win.shareTitle': 'Teilen Sie Ihr Ergebnis',
     'win.shareText': 'Ich habe ein {size}x{size} Nonogramm in {time} gelöst!',

src/composables/useSolver.js

@@ -78,6 +78,9 @@ export function useSolver() {
             } else if (type === 'done') {
                 isProcessing.value = false;
                 pause();
+            } else if (type === 'stuck') {
+                isProcessing.value = false;
+                pause();
             } else {
                 isProcessing.value = false;
             }

src/stores/puzzle.js

@@ -64,6 +64,9 @@ export const usePuzzleStore = defineStore('puzzle', () => {
   const playerGrid = ref([]); // 0: empty, 1: filled, 2: cross
   const isGameWon = ref(false);
   const hasUsedGuide = ref(false);
+  const guideUsageCount = ref(0);
+  const currentDifficulty = ref(null); // 'easy', 'medium', 'hard', 'custom' or object { density: 0.5 }
+  const currentDensity = ref(0);
   const size = ref(5);
   const startTime = ref(null);
   const elapsedTime = ref(0);
@@ -118,23 +121,29 @@ export const usePuzzleStore = defineStore('puzzle', () => {
     resetGrid();
     isGameWon.value = false;
     hasUsedGuide.value = false;
+    guideUsageCount.value = 0;
+    currentDensity.value = totalCellsToFill.value / (size.value * size.value);
     elapsedTime.value = 0;
     startTimer();
+    saveState();
   }
 
-  function initCustomGame(customSize) {
+  function initCustomGame(customSize, density = 0.5) {
     stopTimer();
     currentLevelId.value = 'custom';
     size.value = customSize;
     
     // Generate random grid
-    solution.value = generateRandomGrid(customSize);
+    solution.value = generateRandomGrid(customSize, density);
     
     resetGrid();
     isGameWon.value = false;
     hasUsedGuide.value = false;
+    guideUsageCount.value = 0;
+    currentDensity.value = density;
     elapsedTime.value = 0;
     startTimer();
+    saveState();
   }
 
   function resetGrid() {
@@ -242,6 +251,8 @@ export const usePuzzleStore = defineStore('puzzle', () => {
         playerGrid: playerGrid.value,
         isGameWon: isGameWon.value,
         hasUsedGuide: hasUsedGuide.value,
+        guideUsageCount: guideUsageCount.value,
+        currentDensity: currentDensity.value,
         elapsedTime: elapsedTime.value,
         moves: moves.value,
         history: history.value
@@ -259,6 +270,9 @@ export const usePuzzleStore = defineStore('puzzle', () => {
             solution.value = parsed.solution;
             playerGrid.value = parsed.playerGrid;
             isGameWon.value = parsed.isGameWon;
+            hasUsedGuide.value = parsed.hasUsedGuide || false;
+            guideUsageCount.value = parsed.guideUsageCount || 0;
+            currentDensity.value = parsed.currentDensity || 0;
             elapsedTime.value = parsed.elapsedTime || 0;
             moves.value = parsed.moves || 0;
             history.value = parsed.history || [];
@@ -275,44 +289,9 @@ export const usePuzzleStore = defineStore('puzzle', () => {
     return false;
   }
   
-  function initGame(levelId = 'easy') {
+  // Duplicate initGame removed
-    // If init called without args and we have save, load it?
-    // User might want to start fresh if clicking buttons.
-    // Let's add explicit 'continue' logic or just auto-load on first run.
-    // For now, let's just stick to explicit init, but maybe load on mount if exists?
-    // The user didn't explicitly ask for "Continue", but "features from HTML".
-    // HTML usually auto-saves and loads.
-    
-    stopTimer();
-    currentLevelId.value = levelId;
-    
-    let puzzle = PUZZLES[levelId];
-    if (!puzzle) {
-        puzzle = PUZZLES['easy'];
-    }
-
-    size.value = puzzle.size;
-    solution.value = puzzle.grid;
-    
-    resetGrid();
-    isGameWon.value = false;
-    elapsedTime.value = 0;
-    startTimer();
-    saveState();
-  }
   
-  // Modify initCustomGame similarly
+  // Duplicate initCustomGame removed
-  function initCustomGame(customSize) {
-    stopTimer();
-    currentLevelId.value = 'custom';
-    size.value = customSize;
-    solution.value = generateRandomGrid(customSize);
-    resetGrid();
-    isGameWon.value = false;
-    elapsedTime.value = 0;
-    startTimer();
-    saveState();
-  }
 
   // Duplicate toggleCell/setCell removed
 
@@ -321,6 +300,7 @@ export const usePuzzleStore = defineStore('puzzle', () => {
         resetGrid();
         isGameWon.value = false;
         hasUsedGuide.value = false;
+        guideUsageCount.value = 0;
         elapsedTime.value = 0;
         startTimer();
         saveState();
@@ -332,6 +312,7 @@ export const usePuzzleStore = defineStore('puzzle', () => {
   function markGuideUsed() {
     if (isGameWon.value) return;
     hasUsedGuide.value = true;
+    guideUsageCount.value++;
     saveState();
   }
 
@@ -360,6 +341,8 @@ export const usePuzzleStore = defineStore('puzzle', () => {
     undo,
     closeWinModal,
     hasUsedGuide,
+    guideUsageCount,
+    currentDensity,
     markGuideUsed
   };
 

src/utils/puzzleUtils.js

@@ -40,15 +40,36 @@ export function calculateHints(grid) {
     return { rowHints, colHints };
 }
 
-export function generateRandomGrid(size) {
+export function generateRandomGrid(size, density = 0.5) {
     const grid = [];
     for (let i = 0; i < size; i++) {
         const row = [];
         for (let j = 0; j < size; j++) {
-            // ~25% empty cells
+            row.push(Math.random() < density ? 1 : 0);
-            row.push(Math.random() > 0.25 ? 1 : 0);
         }
         grid.push(row);
     }
     return grid;
 }
+
+export function calculateDifficulty(density) {
+    // Shannon Entropy: H(x) = -x*log2(x) - (1-x)*log2(1-x)
+    // Normalized to 0-1 range (since max entropy at 0.5 is 1)
+    
+    // Avoid log(0)
+    if (density <= 0 || density >= 1) return 'easy';
+    
+    const entropy = -density * Math.log2(density) - (1 - density) * Math.log2(1 - density);
+    
+    // Thresholds based on entropy
+    // 0.5 density -> entropy 1.0 (Extreme)
+    // 0.4/0.6 density -> entropy ~0.97 (Extreme)
+    // 0.3/0.7 density -> entropy ~0.88 (Hardest)
+    // 0.2/0.8 density -> entropy ~0.72 (Harder)
+    // <0.2/>0.8 density -> entropy <0.72 (Easy)
+
+    if (entropy >= 0.96) return 'extreme'; // approx 38% - 62%
+    if (entropy >= 0.85) return 'hardest'; // approx 28% - 38% & 62% - 72%
+    if (entropy >= 0.65) return 'harder';  // approx 17% - 28% & 72% - 83%
+    return 'easy';
+}

src/workers/solverWorker.js

@@ -5,7 +5,7 @@ const messages = {
     'worker.solved': 'Rozwiązane!',
     'worker.logicRow': 'Logika: Wiersz {row}, Kolumna {col} -> {state}',
     'worker.logicCol': 'Logika: Kolumna {col}, Wiersz {row} -> {state}',
-    'worker.guess': 'Zgadywanie: Wiersz {row}, Kolumna {col}',
+    'worker.stuck': 'Brak logicznego ruchu. Spróbuj zgadnąć lub cofnąć.',
     'worker.done': 'Koniec!',
     'worker.state.filled': 'Pełne',
     'worker.state.empty': 'Puste'
@@ -14,7 +14,7 @@ const messages = {
     'worker.solved': 'Solved!',
     'worker.logicRow': 'Logic: Row {row}, Column {col} -> {state}',
     'worker.logicCol': 'Logic: Column {col}, Row {row} -> {state}',
-    'worker.guess': 'Guessing: Row {row}, Column {col}',
+    'worker.stuck': 'No logical move found. Try guessing or undoing.',
     'worker.done': 'Done!',
     'worker.state.filled': 'Filled',
     'worker.state.empty': 'Empty'
@@ -236,29 +236,9 @@ const handleStep = (playerGrid, solution, locale) => {
     }
   }
 
-  for (let r = 0; r < size; r++) {
+  // Check for guess logic - we want to avoid this unless strictly necessary
-    for (let c = 0; c < size; c++) {
+  // If no logic move found, return 'stuck' instead of cheating
-      const current = playerGrid[r][c];
+  return { type: 'stuck', statusText: t(locale, 'worker.stuck') };
-      const target = solution[r][c];
-      let isCorrect = false;
-      if (target === 1 && current === 1) isCorrect = true;
-      if (target === 0 && current === 2) isCorrect = true;
-      if (target === 0 && current === 0) isCorrect = false;
-      if (target === 1 && current === 0) isCorrect = false;
-      if (!isCorrect) {
-        const newState = target === 1 ? 1 : 2;
-        return {
-          type: 'move',
-          r,
-          c,
-          state: newState,
-          statusText: t(locale, 'worker.guess', { row: r + 1, col: c + 1 })
-        };
-      }
-    }
-  }
-
-  return { type: 'done', statusText: t(locale, 'worker.done') };
 };
 
 self.onmessage = (event) => {