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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
   
 
13
 
9
 
28
    
 
9
 
11
  
 
23
7
  
4
9
 
16
14
 
23
17
4
 
17
10
14
6
   
24
16
5
8
  
 
4
19
  
5
8
 
11
 
12
6
 
8
15
4
 
11
 
3
 
 
16
11
10
17
 
20
14
  
   
16
7
12
6
 
14
 
19
 
15
12
16
 
4
 
  
11
10
12
6
11
 
9
5
6
 
   
7
16
 
4
3
20
  
 
6
12
6
12
 
6
 
6
17
 
7
4
5
4
15
 
17
 
 
4
 
  
11
 
  
00:00
You are playing 9x17 easy puzzle 5

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


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