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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
 
 
20
 
11
    
 
15
 
10
  
 
17
 
32
3
 
  
12
 
10
4
13
 
 
35
26
20
13
 
15
11
22
 
8
19
   
24
 
7
26
 
 
33
17
16
17
3
    
20
 
6
14
 
29
 
14
14
 
21
16
25
 
20
15
19
 
  
16
 
12
 
12
 
  
8
 
00:00
You are playing 9x11 challenging puzzle 43355

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