GridbinderGridbinder · Kakuro
Kakuro puzzle book maker for KDP and e-ink
Kakuro readers like arithmetic that behaves like a crossword. They notice a bad grid quickly, so a publisher needs every sum to lead to one answer.
Choose the levels, the trim size and the number of puzzles. You get the grids, a how-to page, an 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 Kakuro can satisfy every clue sum with more than one set of digits, and then the answer key is only one of several right answers. The reader who filled in a different valid grid thinks the book is wrong. Gridbinder runs a complete search for a second solution and drops the puzzle if one exists, and a step-by-step solver must 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 Kakuro book that starts at 6 x 6 and ends at 12 x 12; A Kakuro and Killer Sudoku book for people who like sums; A large print Kakuro book with one grid per page.
How to solve, as printed in the book
Write a number from 1 to 9 in every white cell. A clue in a grey cell is the sum of the run of white cells to its right (upper number) or below it (lower number).
A run is the unbroken line of white cells next to the clue. No number repeats inside a run.
| Easy | 6 x 6 |
|---|---|
| Medium | 8 x 8 |
| Hard | 10 x 10 |
| Challenge | 12 x 12 |
Questions
What grid sizes do the Kakuro levels use?
Easy is 6 x 6, Medium 8 x 8, Hard 10 x 10 and Challenge 12 x 12.
What makes Hard and Challenge harder?
Larger grids, and Hard and Challenge puzzles may need a one-step what-if check. Easy and Medium use direct deductions only. The Verification report lists the steps.
How is Kakuro explained to readers?
The how-to page says: write 1 to 9 in every white cell, a clue is the sum of the run to its right or below it, and no number repeats inside a run.
Other puzzle types
Sudoku · Killer Sudoku · Anti-Knight Sudoku · Nonogram · Slitherlink · 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.
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