KAKURO GUIDE
Kakuro: rules, combinations and puzzle books for adults
Kakuro resembles a numerical crossword. Each run of cells must reach its clue sum using digits 1 to 9, with no repeated digit inside that run.
Updated · AE Book Studio
Read the grid
A black cell may hold two clues: the sum to its right and the sum below. White cells receive digits. Each run applies its own no-repeat rule.
A cell usually belongs to one horizontal and one vertical run; their crossing creates the deduction.
Essential combinations
A total of 3 across two cells forces 1 and 2; a total of 17 forces 8 and 9. Sums near the minimum or maximum have few combinations and make good starting points.
Crossings still determine the order of those digits.
Solving method
List combinations for constrained runs, then intersect horizontal and vertical candidates in each cell. Remove a combination whenever it repeats a digit or conflicts with a crossing.
Place a digit only when certain. Arithmetic supplies possibilities; logic determines positions.
Choose a Kakuro book
Check grid size, level, puzzles per page and complete solutions. An open layout leaves room for candidate notes.
Extreme Kakuro Volume 1 contains 144 9×9 puzzles at two per page, each verified for a unique solution without guessing.
FAQ
Frequently asked questions
Can a digit repeat?
Not within one run, although it may appear in another run.
Does Kakuro require mental arithmetic?
It uses simple addition, followed mainly by combinations and logical intersections.
How is it different from Sudoku?
Kakuro enforces sums; Sudoku enforces one occurrence of each symbol per unit.