Game Objective

Fill the 9×9 grid with digits 1-9 so that each column, each row, and each of the nine 3×3 sub-grids contains all digits from 1 to 9 without repetition.

Basic Rules
  • •Each row must contain the digits 1-9 without repetition
  • •Each column must contain the digits 1-9 without repetition
  • •Each 3×3 box must contain the digits 1-9 without repetition
  • •Some cells are pre-filled and cannot be changed
  • •Use logic and deduction to fill in the empty cells
How to Play
  • 1.Select a cell: Click on any empty cell to select it
  • 2.Enter a number: Click a number (1-9) to fill the selected cell
  • 3.Use notes: Click the pencil icon to toggle notes mode for marking possibilities
  • 4.Clear cell: Use the Clear button to remove a number from the selected cell
  • 5.Get hints: Click Hint button if you're stuck (increases hint counter)
  • 6.Pause/Resume: Pause the game anytime to take a break
Difficulty Levels
🌱 Easy

30 cells removed

Perfect for beginners

âš¡ Medium

40 cells removed

Moderate challenge

🔥 Hard

50 cells removed

Requires advanced techniques

💀 Expert

55 cells removed

For Sudoku masters!

Tips & Strategies
  • 💡Start simple: Look for rows, columns, or boxes that are nearly complete
  • 💡Use notes: Mark possible numbers in cells to keep track of options
  • 💡Scan systematically: Check each number 1-9 across the entire grid
  • 💡Look for singles: Find cells where only one number can fit
  • 💡Use elimination: Cross out impossible numbers to narrow down choices
  • 💡Check your work: Red highlights indicate conflicts - fix them quickly!
Pro Tip

Advanced technique: "Naked pairs" - If two cells in a row/column/box can only contain the same two numbers, you can eliminate those numbers from other cells in that region!