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About game
There are three difficulty levels available for the game: simple, medium, and difficult.
The goal of the game is to solve Sudoku. You can take advantage of hints during the game.
The more difficult the level and the fewer hints you used, the higher rating you will get.
How to play
Sudoku has a field of 9x9 cells.
Each cell in the field must be filled with numbers from 1 to 9. Some of the cells are filled at the start.
The main rule of Sudoku is that the same number must not be repeated in more than one of these at a time: a row, a column, a small square.