The Objective: Fill the 9×9 grid so that every row, every column, and every 3×3 box contains the numbers 1 through 9 without repeating any number.
Game Tools & Rules:
- Difficulty: Choose from Beginner to Pro to match your preferred puzzle complexity.
- ➕ New Game: Starts a completely fresh puzzle board.
- 🔄 Reset: Resets all user inputs on the current board back to the initial clues.
- ✏️ Pencil: Toggle Pencil ON to write candidate numbers in empty cells without committing an answer.
- ↩ Undo / 🧹 Erase: Revert your last move or clear selected values/pencil notes.
- 💡 Hint: Automatically fills in the correct number for the selected cell (single-use per game).
- Mistakes: Entering an incorrect number registers a mistake. Reaching 3 mistakes ends the game!