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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
 
 
16
 
9
    
 
11
 
15
 
18
 
37
 
7
10
 
 
14
30
 
21
 
34
12
   
16
37
 
11
5
 
 
26
 
12
29
 
11
10
13
6
 
 
10
19
3
14
 
30
3
25
 
 
13
16
17
9
 
 
7
10
 
  
 
5
10
 
3
16
8
 
8
 
14
25
 
23
 
18
 
  
8
 
00:00
You are playing 9x11 hard puzzle 5495

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


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