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 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
 
30
 
24
 
17
   
 
24
 
16
29
 
 
29
17
 
27
 
16
16
23
 
24
29
 
17
 
24
17
 
22
 
11
   
24
24
3
7
 
24
17
7
4
16
 
21
 
17
 
 
18
 
00:00
You are playing 8x8 challenging puzzle 73012

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