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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.

Kakuro Blog
Kakuro Rules
Kakuro Tutorials: Basic Challenging

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
 
 
23
 
34
    
 
7
 
12
  
 
22
 
9
8
 
 
5
14
10
17
 
33
 
8
11
14
 
 
19
11
6
 
14
16
 
 
3
15
 
 
7
 
5
6
12
6
 
 
8
15
15
 
35
  
6
 
7
14
11
 
 
13
16
 
 
10
11
9
 
10
6
 
5
11
9
6
 
30
 
8
 
6
 
  
14
 
00:00
You are playing 9x11 challenging puzzle 42005

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