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How to solve Videos Forum Timed Rankings Books Print Subscribe   Solution 23 Jun 2022
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 225 times
abcdefgh
1 
2-
 
1-
 
0 mod
3
2
15+
Clear cell
Bold cell
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Undo
2 
 
9+
36×
 
 
1-
 
 
3 
3 mod
 
2 mod
 
8
1 mod
 
2
4 
 
18×
 
3 mod
 
10+
 
3-
5 
2 :
 
1 mod
9+
1 mod
17+
 
 
6 
 
5-
 
 
 
280×
 
6
7 
384×
 
2-
 
 
 
 
8+
8 
 
 
 
7
2 :
 
3
 

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 a longer explanation.


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