Easy to read. Each puzzle has only 1 solution. 250 puzzles of silver level. Wide inner edges allow recording of solution options. Ideal gift for all fans of puzzles. Sudoku 6x6, separated by smaller rectangles of 3x2 cells. It is necessary to fill empty cells with numbers from 1 to 6, each of the digits should appear only once in each line of the 6 x 6 square, 6 x 6 column and 3x2 rectangle. The boundaries indicated in the Sudoku separate consecutive digits from each other. The figures differ from each other by one. In this puzzle, the numbers from 1 to 6 do not repeat also on the two main diagonals of the large square, marked by dashed lines. Excellent purchase for fans of Sudoku. A great book for relaxing in your spare time. There are 148 pages. The format is 6 '' x 9 ''. I hope you enjoy my book. I would also be very grateful if you could write a review. Thank you. Best regards, Andrii Pitenko