Game Settings

Difficulty

Change the difficulty level from the main game screen. Each difficulty offers different challenges:

  • • Easy: 30 empty cells, great for learning
  • • Medium: 40 empty cells, moderate challenge
  • • Hard: 50 empty cells, requires advanced techniques
  • • Expert: 55 empty cells, for masters only!

Controls

  • • Click a cell to select it
  • • Click a number (1-9) to fill the cell
  • • Use the pencil button to toggle notes mode
  • • Use Clear button to erase a cell
  • • Use Hint button when stuck

Features

  • • Timer: Tracks your solving time
  • • Notes Mode: Mark possible numbers in cells
  • • Error Detection: Invalid entries are highlighted in red
  • • Hints: Get help when you're stuck
  • • Pause/Resume: Take breaks without losing progress
  • • Best Times: Your fastest completion times are saved
About Sudoku

Sudoku is a logic-based number puzzle that originated in Japan. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids contains all of the digits from 1 to 9.

Despite the name meaning "single number" in Japanese, Sudoku is a game of logic, not mathematics. No arithmetic is involved - only logical deduction!

Each puzzle has a unique solution and can be solved without guessing. Improve your logical thinking and problem-solving skills while having fun!