Welcome to Sudoku Puzzle

Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 sub-grids that compose the grid (also called "boxes", "blocks", "regions", or "sub-squares") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which typically has a unique solution.


  • Goal of the game
  • 1. No duplicates of the numbers 1-9 horizontally.
  • 2. No duplicates of the numbers 1-9 vertically
  • 3. No duplicates of the numbers 1-9 in the 3x3 cell groups
  • Click on a cell and use your keyboard to type in the numbers

If you find it hard to solve sudoku problems in either level, please feel free to explore our How to Solve article. You may wish to know about the history of Sudoku game. You can find History of Sudoku along with interesting facts here. For information on different variants of Sudoku as played today, please read this article. Different Mathematics of Sudoku can be found here

Tip! Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single integer may not appear twice in the same 9x9 playing board row or column or in any of the nine 3x3 subregions of the 9x9 playing board.