- 250 exciting, exciting puzzles - hard and believe the hard version as a champion, the golden prize of extreme Sudoku. - each Sudoku has a unique solution - tasks are conveniently located - large font - develops memory, logical thinking, helps to focus - 2 puzzles on the page - wide internal fields allow you to record your decisions and thoughts- very convenient and practical - expands creative possibilities - perfect gift for all fans of puzzles. Sudoku 9x9, separated by smaller rectangles of 3x3 cells. It is necessary to fill empty cells with numbers from 1 to 9, each of the digits should appear only once in each line of the 9x9 square, 9x9 column and 3x3 rectangle. The sum of all the numbers in the cage must correspond to the number printed in the corner. An excellent book for free time pastime and mind training. Presented 150 pages. The format is 6 '' x 9 ''. I hope you enjoy my book. This Sudoku will provide you with rest, color your leisure time, transform your free time into relaxation, give rest from everyday to your mind, add zest, develop memory, develop logical thinking and concentration of attention. I would also be very grateful if you could write a review. Thank you. Best regards, Andrii Pitenko