Cipher Sudoku

Cipher Sudoku brings a cryptographic twist to the classic Sudoku puzzle. Instead of regular numbers, you'll solve puzzles where numbers are encrypted as letters using a shift cipher. Each difficulty level introduces a different encryption pattern, adding an extra layer of challenge to the traditional Sudoku experience.

**Features:**

- 🧩 Classic 9x9 Sudoku grid with a cryptographic twist

- 🎯 Multiple game modes: Classic, Time Attack, and Challenge

- 🎨 10 beautiful color themes including Light, Dark, Ocean, Forest, and more

- 🌍 Full translations in 13 languages

- 🎓 Interactive tutorials and advanced training modules

- ⚡ Time Attack mode with scoring system

- 🏆 Challenge mode with special rules

- 💾 Automatic progress saving

- ⌨️ Full keyboard support

- 📱 Responsive design for all screen sizes

### Game Modes

1. **Classic Mode**

   - Traditional gameplay with no time pressure

   - Perfect for learning the cipher system

   - Unlimited hints and moves

2. **Time Attack Mode**

   - Race against the clock

   - Bonus time for correct moves

   - Time penalties for mistakes

   - Scoring based on speed and accuracy

3. **Challenge Mode**

   - Special rules and constraints

   - Limited hints available

   - Stricter time limits

   - No mistakes allowed in hard mode

## Technical Details

### Minimum Requirements

- Any modern web browser (Chrome, Firefox, Safari, Edge)

- JavaScript enabled

- 1024x768 minimum screen resolution

- Touch support for mobile devices

### Controls

- Mouse/Touch: Click or tap cells to select and input numbers

- Alt + S: Show possible solutions

- Undo/Redo buttons for corrections

- Mode switch between numbers and letters