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How to solve Videos Forum Timed Rankings PDF Print   Solution 15 Aug 2019
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
Difficult 8 × 8, Rating: ★★★★★      Solved 287 times
abcdefgh
1 
7
8
20×

2 :

4
7+
2 


6
8
1 mod
3 mod

3 
3-
14+
1-

1 mod


12×
4 



4 mod

7+
12×

5 
1 mod
3
6-

1-


6 :
6 

21+

3 mod

12+


7 




1-

40×

8 
2 :

9+


8

7

Note: this puzzle also uses the modulo operator mod
a mod b = r means that when dividing a by b, the remainder is r. For example, 5 mod 2 = 1, and 3 mod 5 = 3.
Look here for some more explanations.


total
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