A Sudoku is a logic-based and not a math-based puzzle. It is possible to make und solve a Sudoku puzzle with letters or even some symbols.A little interesting point is that there are 6,670,903,752,021,072,936,960 possible Sudoku puzzles. So we can play umpteen Sudokus a day and there will still be new onesNew Sudoku puzzles from popular author Thusaanth sasiyananthamSuitable for all levels: beginner to skilled.lots of puzzles: 300 + exhausting puzzles.Expertly crafted with correct talent levels)Easy to tear out, because of wide margins.