250 great puzzles. The levels continue to grow. You can start with a bronze medalist, these are the first 80 puzzles of the EASY level. You can go to the champion, the golden prize - 90 extreme sudoku levels HARD and VERY HARD. Silver puzzles of the MEDIUM level are in the middle of the book. 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. Ideal gift for all fans of puzzles.Sudoku 9 x 9 x 5, separated by smaller squares of 3 x 3 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 3 x 3.) In Sudoku Anti Diagonal each diagonal of the square contains no more than three different digits.I hope you enjoy my book.Best regards, Andrii Pitenko