Cross sum puzzles online
Open the interactive Kakuro board and fill digits directly in your browser.
Play cross sums onlineKakuro by another name
Cross Sum Puzzles
Cross sum puzzles are number logic grids where each clue gives the total for an across or down run. They are also known as Kakuro. Play online, print worksheets, or use the combination solver when a clue gets stuck.
Cross sum tools
Choose a cross sum puzzle tool
This page targets the Cross Sums name directly, while the main Kakuro pages target users searching for Kakuro by name.
Printable cross sum puzzles PDF
Create paper worksheets with clue grids and optional solutions.
Print cross sum puzzlesCross sum puzzles with answers
Use the answer-key page when solutions are required for classroom or self-checking.
Print with answersCross sum combination solver
Enter a clue total and run length to list valid no-repeat digit combinations.
Use combination solverCross sums explained
How cross sum puzzles work
Each clue points to a row run or column run. Fill the white cells with digits 1 through 9. The digits in a run must add up to the clue total, and no digit can repeat inside that run.
- Across clues. These apply to the white cells to the right of a clue cell.
- Down clues. These apply to the white cells below a clue cell.
- No repeated digits. A run cannot use the same digit twice.
- Intersections solve the grid. Every white cell must satisfy both its across and down clue.
Cross sum example
A 2-cell clue of 17 must use 8 and 9. A 3-cell clue of 6 must use 1, 2, and 3. These unique combinations are the easiest way to start.
Cross sum puzzles printable
Printable cross sums are useful for travel, classrooms, puzzle clubs, and quiet paper solving.
Cross sums vs Sudoku
Sudoku uses rows, columns, and boxes. Cross sums use clue totals and no-repeat runs. Both reward precise digit logic.
Kakuro is the common name
If you searched for cross sums, most modern puzzle sites and books will also call the same puzzle Kakuro.
Use combinations before guessing
Many cross sum moves come from knowing which digit sets can create a clue total. Use the solver helper for those lists.
Cross Sum Puzzles FAQ
Are cross sum puzzles the same as Kakuro?
Yes. Cross sum puzzles are commonly known as Kakuro. Players fill digits so each across or down run adds to its clue total without repeated digits.
Can I print cross sum puzzles?
Yes. SudokuGrid.app provides printable Kakuro and cross sum puzzle worksheets with optional answer keys.
What is the easiest way to solve cross sums?
Start with short runs and unique combinations, then compare each cell's across clue with its down clue.