diff --git a/package-lock.json b/package-lock.json
index db9573a..c372dad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "vue-nonograms-solid",
-  "version": "1.12.10",
+  "version": "1.12.11",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "vue-nonograms-solid",
-      "version": "1.12.10",
+      "version": "1.12.11",
       "dependencies": {
         "fireworks-js": "^2.10.8",
         "flag-icons": "^7.5.0",
diff --git a/package.json b/package.json
index 7d9a0e9..c42b6c0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-nonograms-solid",
-  "version": "1.12.10",
+  "version": "1.12.11",
   "homepage": "https://nonograms.7u.pl/",
   "type": "module",
   "scripts": {
diff --git a/scripts/run_simulation.mjs b/scripts/run_simulation.mjs
new file mode 100644
index 0000000..b347d9c
--- /dev/null
+++ b/scripts/run_simulation.mjs
@@ -0,0 +1,47 @@
+
+import { generateRandomGrid, calculateHints } from '../src/utils/puzzleUtils.js';
+import { solvePuzzle } from '../src/utils/solver.js';
+import fs from 'fs';
+
+const SIZES = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
+const DENSITIES = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9];
+const SAMPLES = 200; // High sample count for stability
+
+console.log('Starting simulation...');
+console.log(`Sizes: ${SIZES.join(', ')}`);
+console.log(`Densities: ${DENSITIES.join(', ')}`);
+console.log(`Samples per point: ${SAMPLES}`);
+
+const results = {};
+
+async function run() {
+    const totalSteps = SIZES.length * DENSITIES.length;
+    let currentStep = 0;
+    const startTime = Date.now();
+
+    for (const size of SIZES) {
+        results[size] = [];
+        for (const density of DENSITIES) {
+            let totalSolved = 0;
+            for (let i = 0; i < SAMPLES; i++) {
+                const grid = generateRandomGrid(size, density);
+                const { rowHints, colHints } = calculateHints(grid);
+                const { percentSolved } = solvePuzzle(rowHints, colHints);
+                totalSolved += percentSolved;
+            }
+            const avg = Math.round(totalSolved / SAMPLES);
+            results[size].push(avg);
+            
+            currentStep++;
+            const pct = Math.round((currentStep / totalSteps) * 100);
+            const elapsed = ((Date.now() - startTime) / 1000).toFixed(0);
+            process.stdout.write(`\rProgress: ${pct}% (${currentStep}/${totalSteps}) - Elapsed: ${elapsed}s`);
+        }
+    }
+    
+    console.log('\n\nSimulation complete!');
+    console.log('SIM_DATA = ' + JSON.stringify(results, null, 4) + ';');
+    fs.writeFileSync('simulation_results.json', JSON.stringify(results, null, 4));
+}
+
+run();
diff --git a/src/utils/puzzleUtils.js b/src/utils/puzzleUtils.js
index 775f04c..86d5a20 100644
--- a/src/utils/puzzleUtils.js
+++ b/src/utils/puzzleUtils.js
@@ -64,18 +64,21 @@ export function calculateDifficulty(density, size = 10) {
     // Data derived from Monte Carlo Simulation (Logical Solver)
     // Format: { size: [solved_pct_at_0.1, ..., solved_pct_at_0.9] }
     const SIM_DATA = {
-        5: [86, 73, 74, 80, 88, 98, 99, 99, 100],
-        10: [57, 22, 19, 44, 86, 99, 100, 100, 100],
-        15: [37, 7, 2, 12, 70, 99, 100, 100, 100],
-        20: [23, 3, 0, 3, 40, 99, 100, 100, 100],
-        25: [13, 1, 0, 1, 19, 99, 100, 100, 100],
-        30: [8, 1, 0, 0, 4, 100, 100, 100, 100],
-        35: [5, 0, 0, 0, 3, 99, 100, 100, 100],
-        40: [3, 0, 0, 0, 1, 96, 100, 100, 100],
-        45: [2, 0, 0, 0, 1, 83, 100, 100, 100],
-        50: [1, 0, 0, 0, 0, 62, 100, 100, 100],
-        60: [0, 0, 0, 0, 0, 18, 100, 100, 100],
-        70: [0, 0, 0, 0, 0, 14, 100, 100, 100],
+        5: [88, 76, 71, 80, 90, 98, 99, 100, 100],
+        10: [58, 25, 18, 44, 81, 99, 100, 100, 100],
+        15: [36, 7, 3, 11, 67, 99, 100, 100, 100],
+        20: [24, 3, 0, 3, 48, 99, 100, 100, 100],
+        25: [13, 1, 0, 1, 21, 99, 100, 100, 100],
+        30: [9, 0, 0, 0, 7, 99, 100, 100, 100],
+        35: [5, 0, 0, 0, 5, 97, 100, 100, 100],
+        40: [3, 0, 0, 0, 2, 91, 100, 100, 100],
+        45: [2, 0, 0, 0, 1, 84, 100, 100, 100],
+        50: [1, 0, 0, 0, 0, 65, 100, 100, 100],
+        55: [1, 0, 0, 0, 0, 55, 100, 100, 100],
+        60: [0, 0, 0, 0, 0, 35, 100, 100, 100],
+        65: [0, 0, 0, 0, 0, 20, 100, 100, 100],
+        70: [0, 0, 0, 0, 0, 11, 100, 100, 100],
+        75: [0, 0, 0, 0, 0, 12, 100, 100, 100],
         80: [0, 0, 0, 0, 0, 4, 100, 100, 100]
     };