Kakuro is like a crossword puzzle with numbers. Each "word" must add up to the number provided in the clue above it or to the left. Words can only use the numbers 1 through 9, and a given number can only be used once in a word. Every kakuro puzzle has one and only solution, and can be solved through logic alone.

Kakuro Hint: Not sure what all of the valid combinations are for a number? Click on the number clue, and a tooltip will show you the possibilities.

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21
 
12
   
 
17
 
4
 
8
 
9
14
 
16
9
8
 
14
3
6
 
6
26
 
16
 
29
10
 
11
3
19
 
11
9
 
 
16
19
8
8
6
25
 
14
 
14
 
 
11
 
 
00:00
You are playing 8x8 challenging puzzle 21019

Start over, and play another kakuro of this size and difficulty.