Welcome to this mind-boggling collection of 50 fantastic 25 x 25 sudoku puzzles. 25 x 25 sudoku puzzles work just the same as regular 9 x 9 sudoku puzzles, but they are, well, a lot bigger Infact whereas a normal sudoku has 81 squares in it, a 25x25 sudoku has 625 squares in it, so you get a lot more puzzle for your money. If you like giant sudoku, and enjoy the satisfaction of solving a puzzle that takes a lot longer to complete than a regular sudoku, then you won't get much bigger than 25 x 25 sudoku puzzles. The puzzles are displayed one puzzle per page at a generous page size 8.5" x 11" (21.59 x 27.94 cm). Therefore there is sufficient space for you to work through the puzzles and be able to enter pencilmarks in the grid. The givens are distributed symmetrically in each of the 50 puzzles, and each puzzle has one unique solution that can be reached through the use of logical rules alone - there's never any need to guess. To solve then just place the numbers from 1 - 25 once in each row, column and 5x5 box.