1000+ Killer Sudoku Variants

1000+ Killer Sudoku Variants is the biggest Killer Sudoku collection we publish: more than 1,000 puzzles in every book, across six kinds of Killer Sudoku. Alongside the classic 9x9, you'll find Killer Sudoku on 8x8, 10x10 and 12x12 grids, plus Killer X and Killer Windoku.

The rules stay the same throughout. Every row, column and box holds each number once, and the numbers in each outlined cage must add up to its total with no number repeated. Killer X adds the two long diagonals, which must also hold each number once, and Killer Windoku adds four extra shaded boxes with the same rule. Switching between grid sizes and variants keeps the arithmetic and the logic fresh.

There are three books: Easy to Hard, Medium to Very Hard, and Hard to Extreme. Start with Easy to Hard if Killer Sudoku is new to you, and keep a list of cage combinations to hand; move up when the common totals become second nature.

The books are printed at 8.5 x 11 inches. With this much variety, a single book gives you months of solving. For big, clear grids, see 157 Large Print Killer Sudoku.