The goal of the game is to complete levels from beginner to master in order to pump your rating and reach the pinnacle of Sudoku mastery.
A field with 9x9 cells consists of 9 squares, in each of which you need to enter numbers from 1 to 9. But several rules must be observed:
1. Numbers should not be repeated in one square.
2. Numbers should not be repeated in the same column.
3. Numbers should not be repeated in one line.