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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: 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
   
 
37
 
20
 
11
 
8
    
 
15
 
27
 
10
9
  
14
 
22
 
 
13
8
24
24
 
  
27
14
 
17
26
15
15
3
 
14
4
11
10
  
14
 
11
16
 
9
 
14
31
 
6
9
9
 
3
14
18
19
 
 
7
26
12
 
36
 
26
19
 
15
5
11
13
5
 
29
30
   
10
24
11
16
 
13
29
13
16
9
11
34
 
5
 
 
6
22
 
 
6
9
10
17
 
  
28
 
13
 
  
15
 
  
00:00
You are playing 9x17 hard puzzle 57638

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


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