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How to solve Videos Forum Timed Rankings Books Print   Solution 26 Jan 2023
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 321 times
abcdefgh
1 
7
1
0-
 
11+
2 mod
 
0 mod
Clear cell
Bold cell
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Undo
2 
18×
 
3 :
 
 
12+
 
 
3 
4
 
 
2 mod
 
1 mod
1-
1 mod
4 
17+
 
17+
 
 
 
 
5 
 
5
 
 
210×
0 mod
 
56×
6 
4-
4
3 mod
 
 
 
42×
 
7 
 
20+
 
4
1 mod
 
 
3 mod
8 
 
 
 
30×
 
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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