900 Sudoku Size Variations

900 Sudoku Size Variations is all about grid size. Instead of 9x9 on every page, you work through six sizes: a quick 6x6, then 8x8, 10x10, 12x12 and 15x15, up to a full 16x16. Each size changes how many numbers you use and the shape of the boxes, so the same rules feel new each time.

Small grids are perfect when you have a few minutes; the big ones are for when you want to settle in. Having all six sizes in one book means a change of pace is always a page away.

There are three books: Easy to Hard, Medium to Very Hard, and Hard to Extreme, with 900 puzzles in each. The rules stay simple at every size: each row, column and box holds every number once, and nothing else changes.

The books are printed at 8.5 x 11 inches. If you find you love the biggest grids, take a look at 300 16x16 Mega Sudoku and Hard Core 16x16 Sudoku 200, where every puzzle is 16x16.