Sudoku

00:00
2
7
9
4
8
6
8
6
4
9
3
3
9
6
2
5
7
4
2
1
3
3
4
6
2
8
6
8
2
7
4
1
4
7
6
9
6
9
1
2
6
5

How to Play

Fill every empty cell in the 9x9 grid so that each row, each column, and each 3x3 box contains all the digits from 1 to 9 exactly once. Some numbers are pre-filled as clues. Use logic and elimination to determine the correct number for each cell. The puzzle has a unique solution — no guessing is required if you reason carefully.

Controls

Click or tap an empty cell to select it, then type a number (1-9) or tap the number pad to fill it in. Press Delete or Backspace to clear a cell. Use pencil/note mode to jot down candidate numbers for tricky cells.

Tips & Strategy

Start with rows, columns, or boxes that already have the most numbers filled in. Use the elimination technique — check what numbers are missing and where they can possibly go. Look for naked singles (cells where only one number fits) and hidden singles (numbers that can only go in one place within a row, column, or box).