Alena Gurin

Hard Sudoku X Puzzle Book for Adults Alena Gurin

250 excellent puzzle 9x9 at the level of Hard. All riddles have only 1 solution. 2 puzzles per page. The font size is correct, you will not have to strain your eyes when solving puzzles. For Advanced Players . High quality paper and print (all puzzles read well, easy to write with pen and pencil without worry of bleed-through). Sudoku X is based on the original Sudoku grid, with the same rules and numbers-1 to 9(no number may appear twice in any row or column and rectangles of 3x3). Sudoku X (Diagonal Sudoku) puzzles both diagonals must contain all digits from 1 to 9 precisely once