Sudoku 9x9, separated by smaller squares of 3x3 cells. The entire playing field consists of 81 cells. It is required to fill empty cells with numbers from 1 to 9, each of the digits should appear only once in each row, column and 3x3 square.An excellent book for free time pastime and mind training.Presented 300 pages. Format 8.5'' x 11 ''.6 Sudoku puzzle on the page. Conveniently positioned for better perception.1200 unique puzzles. 300 EASY + 300 MEDIUM + 300 HARD + 300 VERY HARDI hope you will enjoy my book. I would also really appreciate it if you could write a review.Thank you.Best regards, Andrii Pitenko
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