Pro Tip

Work the most constrained areas first — rows, columns, or boxes that already have the most filled digits.

Pro Tip
✓ Completed! 👍
2
8
3
2
9
6
3
7
1
3
2
5
8
6
2
7
8
7
2
4
1
5
9
8
Sudoku Trivia

Irregular Sudoku (also called Squiggly Sudoku) uses non-rectangular regions instead of 3×3 boxes, requiring different solving strategies.

Sudoku Trivia