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 a number is yet? Fill in its remaining possible values -- the cell will automatically resize to accommodate.

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Also try sudoku and hitori
     
 
27
 
27
 
7
 
 
38
 
6
   
7
 
8
5
 
 
7
39
32
25
 
10
33
 
10
33
 
8
14
6
 
33
17
 
11
12
11
17
33
 
   
8
 
20
 
   
00:00
You are playing 8x8 challenging puzzle 17147

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