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4x4: easy intermediate hard challenging expert
6x6: easy intermediate hard challenging expert
8x8: easy intermediate hard challenging expert
9x11: easy intermediate hard challenging expert
9x17: easy intermediate hard challenging expert

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.

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Kakuro Hint: Start with clues that only have one valid combination. For example, 3 in 2 must be 1 and 2, and 23 in 3 must be 6, 8, and 9.

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16
 
6
    
 
4
 
5
    
 
6
8
 
18
4
7
 
14
  
40
 
 
7
7
 
8
15
  
3
15
   
8
21
  
23
17
 
15
16
  
10
24
    
16
 
  
23
10
 
14
 
17
15
 
9
20
 
30
17
22
   
41
 
 
 
5
11
4
16
21
    
38
 
 
21
 
10
4
 
 
21
16
13
9
 
   
17
 
  
16
4
 
 
11
17
24
  
9
7
  
18
 
  
3
5
 
24
 
4
14
 
 
7
3
10
12
3
 
40
 
   
3
 
  
9
 
  
00:00
You are playing 9x17 easy puzzle 21

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


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