Kakuro
0:00Tap a square, then a number
How to play
Fill the white squares with digits 1 to 9. Each dark square with a diagonal holds clues: the number above the line is the sum of the white squares to its right, and the number below the line is the sum of the white squares below it. A digit cannot repeat within one sum.
Kakuro uses the same sums as killer sudoku, so the combinations table helps here too. A run of 2 cells with the sum 3 must be 1 and 2, and 17 must be 8 and 9.
More puzzles
Killer sudokuDaily puzzle and four levelsClassic sudokuEasy to expertSamurai sudokuFive grids that overlapJigsaw sudokuIrregular regionsX sudokuDiagonals count tooMini sudoku4×4 and 6×6 for kids
Questions
What are the kakuro sizes?
Small is a 5 × 5 playing area, medium 7 × 7 and large 9 × 9 (including the clue squares, the grids are 6, 8 and 10 squares wide).
Does every kakuro have one solution?
Yes. Every puzzle was checked by a computer solver, which confirmed that it has exactly one solution.
Is kakuro the same as cross sums?
Yes. Kakuro is also called cross sums.