Sudoku Classic

Train your brain with classic 9x9 Sudoku puzzles across 4 difficulty levels.

📖 How to Play

• ✓ Fill the 9x9 grid so that every row, column, and 3x3 box contains digits 1-9.
• ✓ No number can repeat within any row, column, or 3x3 subgrid.
• ✓ Use notes to write potential candidates for tricky empty cells.

🎮 Game Controls

💡 Strategy & Tips

• ✦ Look for rows or columns that already have 7 or 8 numbers filled.
• ✦ Use cross-hatching to find where a specific number must go in a 3x3 box.
• ✦ Don’t guess! Every valid Sudoku puzzle can be solved using pure logic.

❓ Frequently Asked Questions