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How to solve Videos Forum Timed Rankings Books PDF Print 28 Mar 2024
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: ★★★★★  Points: 8     Solved 272 times
abcdefgh
1 
1 mod
 
2 mod
 
9+
5 mod
 
14+
Clear cell
Bold cell
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2 
6 :
7
6 mod
1 mod
 
4 mod
 
 
3 
 
2-
 
 
3 mod
 
 
1 mod
4 
5+
 
0 mod
4 :
 
0 mod
21+
 
5 
 
22+
 
 
1 mod
 
 
 
6 
35×
 
 
14+
 
3
8+
 
7 
 
2
 
 
11+
 
 
7
8 
0-
 
 
5
 
4-
 
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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