Basic Rules

The goal of Sudoku is to fill a 9x9 grid with numbers so that each row, column and 3x3 block contain all of the digits between 1 and 9.

1. Rule of Rows

Every row must contain the numbers from 1 to 9, without repetitions.

1
2
3
4
5
6
7
8
9

2. Rule of Columns

Every column must contain the numbers from 1 to 9, without repetitions.

1
2
3
4
5
6
7
8
9

3. Rule of 3x3 Blocks

Every 3x3 block must contain the numbers from 1 to 9, without repetitions.

1
2
3
4
5
6
7
8
9
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