Number Crossword

Kakuro

Fill the grid with numbers that add up to the clues. A challenging blend of crossword and Sudoku!

Puzzle 1 - Beginner
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Number Crossword Puzzle

Select Puzzle:

→ Horizontal sum↓ Vertical sum

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About Kakuro

Kakuro (also known as Cross Sums) is a logic puzzle that originated in Japan. It combines the logic of Sudoku with the structure of a crossword puzzle, creating a unique and challenging brain exercise.

The objective is simple: fill in the white cells with digits 1-9 so that each consecutive run of cells (horizontal or vertical) adds up to the clue number shown. The catch? You cannot repeat any digit within a single run.

Kakuro puzzles require both logical deduction and knowledge of number combinations. As you practice, you'll learn the possible combinations for common sums, making you faster at solving these engaging puzzles.

How to Play Kakuro

1

Understand the Clues

Each clue cell shows the sum that the adjacent cells must total. Green numbers (bottom-left) are for horizontal runs; blue numbers (top-right) are for vertical runs.

2

Fill in Numbers

Click a cell and enter a digit 1-9. The numbers in each run must add up to the clue and cannot repeat within that run.

3

Use Logic

Use process of elimination and intersection logic to determine which numbers go where. Complete the entire grid to win!

Frequently Asked Questions

Kakuro is a number puzzle that combines elements of crosswords and Sudoku. You fill in cells with digits 1-9 so that each horizontal and vertical run adds up to the clue number, without repeating any digit within a run.
Click on an empty cell to select it, then enter a number 1-9. The numbers in each horizontal run must sum to the left clue, and each vertical run must sum to the clue above. No digit can repeat within a single run.
The challenge is finding combinations of unique digits that sum to the clue numbers. For example, if a 3-cell run must sum to 6, the only possibility is 1+2+3. Learning these combinations is key to solving puzzles quickly.
Yes! Our Kakuro game is completely free to play online with no downloads required. Your progress is automatically saved in your browser.
The game is fully optimized for mobile devices, tablets, and desktop computers. Tap cells to select them and use the number pad to enter values.
Clue cells have a diagonal line separating two numbers. The number in the top-right is the sum for the column below. The number in the bottom-left is the sum for the row to the right.
Start with runs that have only one possible combination (like 3 in 2 cells = 1+2, or 17 in 2 cells = 8+9). Use process of elimination and look for cells where runs intersect to narrow down possibilities.
While both use logic and numbers 1-9, Kakuro involves addition and allows digits to repeat in the grid (just not in the same run). Kakuro is often considered more mathematical than Sudoku.

Tips & Strategies

  • •Learn key combinations: 3 in 2 cells = 1+2, 4 in 2 cells = 1+3, 16 in 2 cells = 7+9
  • •Start with runs that have only one possible combination
  • •Look for intersections where horizontal and vertical runs share a cell
  • •Use the constraint that digits can't repeat within a run to eliminate options
  • •For longer runs, work out which digits must be included to reach the sum

Why Play Kakuro?

Math Skills

Improves mental arithmetic

Logic Training

Develops deductive reasoning

Free Forever

No payment required

Brain Exercise

Keep your mind sharp

Related Games

If you enjoy Kakuro, try these other number puzzles:

SudokuKenKenNonogramAll Games
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