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How to solve Videos Forum Timed Rankings Books PDF Print 22 Apr 2024
Easy:
4×4
5×5
6×6
Killer
Sudoku
Medium:
4×4
6×6
7×7
Sudoku
Difficult:
4×4
5×5
6×6
7×7
9×9
Extra
Difficult 7 × 7, Rating: ★★★★★  Points: 9     Solved 106 times
abcdefg
1 
1-
60×
 
17+
 
3-
 
Clear cell
Bold cell
Toggle pencil mode
Hide buttons
Change buttons position
Undo
2 
 
 
10+
 
36×
 
420×
3 
1-
 
 
 
 
 
 
4 
10+
 
24×
 
1 :
 
 
5 
 
 
 
 
10+
 
6 
16+
72×
 
12×
 
21×
 
7 
 
 
 
5
 
1 mod
 

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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