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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 all of the valid combinations are for a number? Click on the number clue, and a tooltip will show you the possibilities.

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Also try sudoku and hitori
 
 
9
 
7
    
 
19
 
11
 
8
 
30
  
3
 
  
14
34
 
6
12
 
37
9
 
17
 
  
11
16
 
 
21
6
33
 
21
13
36
 
6
11
 
30
 
9
 
7
14
6
 
39
 
9
4
 
15
11
  
7
17
 
19
  
7
 
 
9
14
6
 
11
33
 
12
 
 
29
 
  
16
 
00:00
You are playing 9x11 expert puzzle 20365

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