Each cell can be filled with a number from 1 to 9 and the horizontal or vertical sum of those numbers must be equivalent to the corresponding number at the end of the vertical or horizontal line. Keep in mind that the same number cannot be present twice in the same row or column.

Click Pen to fill in numbers

Pen

Click Pencil to keep notes on possible numbers

Pencil

X

Game Play For Kakuro

Kakuro is a puzzle game that's a cross between both traditional crosswords and Sudoku.
Just like Sudoku you must fit the digits 1 to 9 into a grid of squares so that no digit is repeated within a
defined area. And just like a crossword there's a grid of filled blocks and clues to solve.
In Kakuro, there are across and down clues, just like in a crossword, but they give the sum of
the digits in the relevant areas - which is why the puzzles are also called Cross Sums. The clues are written within
the grid, to the left or the top of the area they apply to.
As in Sudoku, the puzzle doesn't submit well to random guessing because there are a very large number of possible
number combinations, so they are best solved using logic. Some of the same logic can be used as in Sudoku, but you
also need a bit of maths because unlike in Sudoku there is a second restraint: Not only must the digits not repeat
within a clue run, but they also must add up to given totals - these totals replace the traditional word clues found
in a crossword.
If the clue '4' is given for a run of two squares then the two digits that make it up must be '1' and '3', since
'2' and '2' cannot be the answer because this would repeat a digit. '0' is never allowed so '4' is not an option.
Therefore it can be deduced that the two cells each contain either 1 or 3. And then via a process of similar deductions
and reasoning somewhat akin to Sudoku the puzzle can be solved.
When you are not sure for one number or more you can activate the pencil function of Kakuro just by pressing the
button labeled PENCIL. What this button does is that it allows you to mark several numbers that could possibly be part
of the solution.
When you are finished you have to press the PEN button to return to normal number filling and
finish the puzzle!