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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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Also try sudoku and hitori
 
 
6
 
21
    
 
23
 
9
 
14
 
34
 
17
9
 
 
11
32
 
7
 
15
16
22
 
  
13
 
 
 
13
19
41
 
14
10
11
15
 
 
7
31
15
18
 
11
34
 
39
  
 
23
19
15
8
 
12
8
 
6
10
4
 
16
 
14
 
8
11
15
 
17
14
17
8
 
16
 
30
11
 
7
 
 
16
15
29
10
34
15
 
 
6
6
19
4
 
  
11
 
 
19
 
11
12
 
 
16
33
3
22
 
12
 
32
 
  
15
 
00:00
You are playing 9x17 challenging puzzle 63302

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


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