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How to solve Videos Forum Timed Rankings Print   Solution 9 Nov 2012
Easy:
4×4
5×5
Sudoku
Medium:
4×4
5×5
6×6
8×8
Killer
Sudoku
Difficult:
4×4
5×5
6×6
8×8
12×12
Extra
Medium Killer Sudoku, Rating: ★★★      Solved 113 times

One of the World's Hardest Killer Sudokus
can you solve it?
abcdefghi
1 
13
7
15
13

16

16

2 




10

18


3 
17
9

7

15

7
5
4 


18

7

19


5 
20




4



6 



17
8

15

11
7 
16
25



17

24

8 




23



9
9 
4








total
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