LinkedIn Zip Solver Chrome Extension

A Chrome extension that automatically solves LinkedIn Zip puzzles using an intelligent DFS backtracking algorithm.

Features

• 🧩 Automatic Puzzle Detection - Detects grid size and extracts puzzle state
• ⚡ Fast Solver - Uses depth-first search with backtracking to find solutions
• 🎯 Reliable Clicking - Multiple event types ensure compatibility
• 🎨 Modern UI - Clean, LinkedIn-inspired popup interface
• 📊 Debug Logging - Console output for troubleshooting

Installation

From Source (Developer Mode)

1. Download or Clone this repository to your local machine

2. Open Chrome Extensions Page

   • Navigate to chrome://extensions/
   • Or click the three dots menu → More Tools → Extensions

3. Enable Developer Mode

   • Toggle the "Developer mode" switch in the top right corner

4. Load the Extension

   • Click "Load unpacked"
   • Select the linkedin_zip_extension folder
   • The extension should now appear in your extensions list

5. Pin the Extension (Optional)

   • Click the puzzle piece icon in the Chrome toolbar
   • Find "LinkedIn Zip Solver" and click the pin icon

Usage

1. Navigate to LinkedIn Zip

   • Go to LinkedIn Games
   • Click on the "Zip" puzzle

2. Open the Extension

   • Click the LinkedIn Zip Solver icon in your Chrome toolbar
   • Or use the keyboard shortcut (if configured)

3. Solve the Puzzle

   • Click the "Solve Puzzle" button in the popup
   • Watch as the extension automatically solves the puzzle!
   • Check the browser console (F12) for detailed logs

How It Works

Grid Detection

The extension scans the page for cells with data-cell-idx attributes and extracts:

• Grid dimensions (height × width)
• Cell values (numbers 1 through N)
• Empty cells

Puzzle Solving Algorithm

Uses a depth-first search (DFS) with backtracking to find a valid path:

1. Start at cell containing "1"
2. Move to adjacent cells (up, down, left, right)
3. Visit numbered cells in sequential order (1 → 2 → 3 → ...)
4. Fill all empty cells while maintaining the number sequence
5. End at the highest numbered cell

Automated Clicking

Simulates multiple event types for maximum compatibility:

• MouseEvent (mousedown, mouseup, click)
• PointerEvent (pointerdown, pointerup)
• TouchEvent (touchstart, touchend)

Each cell is clicked with a 50ms delay for reliability.

Troubleshooting

Extension Not Working?

Check the Console

• Press F12 to open DevTools
• Look for error messages or logs from the extension

Verify You're on the Right Page

• The extension only works on linkedin.com pages
• Make sure you're on an active Zip puzzle

Reload the Extension

• Go to chrome://extensions/
• Click the refresh icon on the LinkedIn Zip Solver card

Reload the Page

• Refresh the LinkedIn Zip puzzle page
• Try clicking "Solve Puzzle" again

No Solution Found?

Some puzzles may be unsolvable or have complex constraints. Check the console for:

• "No solution found!" - The puzzle may be impossible
• Grid detection errors - The page structure may have changed

Development

File Structure

linkedin_zip_extension/
├── manifest.json       # Extension configuration
├── content.js          # Puzzle solver logic
├── popup.html          # Extension popup UI
├── popup.js            # Popup interaction handler
├── icons/              # Extension icons
│   ├── icon16.png
│   ├── icon48.png
│   └── icon128.png
└── README.md           # This file

Permissions

• activeTab - Access the current tab to inject the solver
• scripting - Execute the content script on LinkedIn pages

Modifying the Solver

Edit content.js to adjust:

• Click delay: Change clickDelay (default: 50ms)
• Grid sizes: Modify possibleSizes array
• Algorithm: Update solveZipPuzzle() function

License

MIT License - Feel free to use and modify!

Contributing

Found a bug or have a feature request? Please open an issue or submit a pull request!

---

Note: This extension is not affiliated with or endorsed by LinkedIn. Use responsibly and for educational purposes.