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.