🔲 How to Play Sudoku

• Click a cell, then click a number (or press keyboard 1–9) to fill it in
• Every row must contain digits 1–9 without repeating
• Every column must contain digits 1–9 without repeating
• Every 3×3 box must contain digits 1–9 without repeating
• Use the 💡 Hint button if you get stuck (reveals one cell)
• Use ✔ Check to highlight any errors in red