250 excellent puzzles at the level of silver. All riddles have only 1 solution. 2 puzzles per page. Enough space for your thoughts and decisions. Very convenient and practical. Good brain support in shape. Expands creative thinking. Wide inner edges allow recording of solution options. Ideal gift for all fans of puzzles. Sudoku 12x12, separated by smaller rectangles of 4x3 cells. It is necessary to fill empty cells with numbers from 1 to 12, each of the digits should appear only once in each line of the 12x12 square, 12x12 column and 4x3 rectangle. The sum of all the numbers in the cage must correspond to the number printed in the corner. In this puzzle, the numbers from 1 to 12 are not repeated also on the two main diagonals of the large square, marked with 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