GridbinderGridbinder · Killer Sudoku
Killer Sudoku puzzle book maker for KDP and e-ink
Killer Sudoku readers have usually finished plain Sudoku and want sums to work with. If you publish for them, you need cage layouts that are fair and a book that gets harder at a steady pace.
Pick the levels or a progressive order, set the trim size and make the book. You get the puzzles, the how-to page, the answer key and a Verification report in one PDF. The free 12-puzzle sample has a watermark and needs no account.
12 puzzles with your settings, watermarked, no account. Full books from $9 a month.
Why the proof matters here
A Killer Sudoku gives no starting numbers, only cage totals, so one weak cage layout can leave two different grids that satisfy every sum. The reader only finds out at the answer key, when their grid differs from the printed one. Gridbinder searches every Killer puzzle for a second solution and drops it if one exists, and a step-by-step solver has to finish it with rules a person can apply.
Books end with a Verification report (on unless you switch it off): each puzzle with its level and size, the number of solutions a complete search found, and, for every type with a step-by-step solver, how it finished the puzzle.
Book ideas: A progressive Killer Sudoku book from 6 x 6 warm-ups to 9 x 9 Hard; A Killer Sudoku book for solvers who have done every ordinary Sudoku; A mixed Sudoku and Killer Sudoku book with a how-to page for each type.
How to solve, as printed in the book
Every row, every column and every box holds each number once: 1 to 6 on a 6 x 6 grid, 1 to 9 on a 9 x 9 grid. A box is the area inside the thicker lines.
The cells inside each dotted cage add up to the small total in its corner, and no number repeats inside a cage. No numbers are given at the start.
| Easy | 6 x 6 |
|---|---|
| Medium | 9 x 9 |
| Hard | 9 x 9 |
Questions
What grid sizes do the Killer Sudoku levels use?
Easy is 6 x 6, using the numbers 1 to 6. Medium and Hard are 9 x 9 (Killer has no separate Challenge level), using 1 to 9.
Are any numbers given at the start?
No. The dotted cages and their small totals are the only clues, and no number repeats inside a cage.
Can I mix Killer Sudoku with other puzzle types in one book?
Yes. Choose several puzzle types in the studio and the how-to pages cover the rules for every type that is in the book. Hard Killer puzzles may need a one-step what-if check, which the Verification report counts.
Other puzzle types
Sudoku · Anti-Knight Sudoku · Nonogram · Slitherlink · Kakuro · Bridges · Masyu · Nurikabe · Star Battle · Number Paths · Word Search · E-ink tablet PDFs
See your own pages first
The free sample uses your settings and real puzzles. Check every page before you pay anything.
Open the studio