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How to solve Videos Forum Timed Rankings Books PDF Print 2 Feb 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: ★★★★★  Points: 8     Solved 29 times
abcdefgh
1 
4 mod
17+
0 mod
 
7
2 mod
1 mod
5+
Clear cell
Bold cell
Toggle pencil mode
Hide buttons
Change buttons position
Undo
2 
 
 
 
0-
 
 
 
 
3 
144×
 
2 mod
 
1-
 
4
1 mod
4 
 
 
 
1
3-
 
1 mod
 
5 
20×
 
3 mod
 
4-
 
 
8
6 
 
1
2-
 
14+
2
3 mod
 
7 
5-
0 mod
 
3 mod
 
 
13+
 
8 
 
0 mod
 
 
3
 
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 a longer explanation.


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