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How to solve Videos Forum Timed Rankings  PDF Print   Solution 2 Apr 2013
Easy:
4×4
5×5
6×6
Killer
Sudoku
Medium:
4×4
6×6
8×8
Killer
Sudoku
Difficult:
4×4
6×6
8×8
9×9
Extra
Difficult 9 × 9, Rating: ★★★★★★      Solved 187 times

The World's Hardest Calcudoku
can you solve it?
abcdefghi
1 
21+


60×


25+


2 

6-

11+

4-
13+


3 

8+
8

2

9
11+

4 
24+

13+

25+
3-


17+
5 


2



3


6 

1-
13+


1-

11+

7 
26+

1
16×
6
12+
7

25+
8 

1-


378×



9 









Note that now you have two days to solve this puzzle (submit before Thursday)

total
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