Sudoku Collection

200 puzzles 9x9 Even-Odd Sudoku 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. High quality paper and print (all puzzles read well, easy to write with pen and pencil without worry of bleed-through). Even-Odd Sudoku 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).Cells with gray circles must contain odd numbers, cells with gray squares must contain even numbers.