Sudoku is a logic-based number placement puzzle that has captivated millions worldwide.
Understanding the Concept
The objective is simple: fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 boxes contains all digits from 1 to 9.
Despite using numbers, Sudoku requires no mathematical calculations - it's pure logic!
Each puzzle starts with some numbers already filled in. These are called "givens" or "clues".
Using logical deduction, you must figure out which numbers go in the empty cells.
Examples
A Sudoku Puzzle
This is what a typical Sudoku puzzle looks like. The given numbers (clues) are filled in, and your job is to fill the empty cells.
5
3
7
6
1
9
5
9
8
6
8
6
3
4
8
3
1
7
2
6
6
2
8
4
1
9
5
8
7
9
Pattern / Involved
The Completed Solution
Every row, column, and 3×3 box contains all digits from 1 to 9 exactly once.
5
3
4
6
7
8
9
1
2
6
7
2
1
9
5
3
4
8
1
9
8
3
4
2
5
6
7
8
5
9
7
6
1
4
2
3
4
2
6
8
5
3
7
9
1
7
1
3
9
2
4
8
5
6
9
6
1
5
3
7
2
8
4
2
8
7
4
1
9
6
3
5
3
4
5
2
8
6
1
7
9
Solution
Pro Tips
- •Start with puzzles that have more given numbers
- •There's always a logical next step - no guessing required
- •Each puzzle has only one correct solution
