- 250 amusing puzzles ] surprise in 250 jigsaw sudoku very hard (need to download and print)- Sudoku 9x9x5, separated by smaller squares of 3x3 cells. The entire playing field consists of 369 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 of the 9 x 9 square, column 9 x 9 and square 3x3. - levels continue to please. 50 Easy + 50 Medium + 50 Hard + 100 Very hard- all riddles have only one verified solution- 2 puzzles on 1 page, very practical and convenient- a lot of free space for the progress of your thoughts- good mind support in excellent form- large font- develops memory, logical thinking, helps to focus- creative possibilities are expandingIdeal gift for all fans of puzzles. An excellent book for free time and learning of the mind. I hope you enjoy the book. I would be very grateful if you write a review.Best regards, Andrii Pitenko
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