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How to solve Videos Forum Timed Rankings Books Print   Solution 30 Jan 2025
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 214 times
abcdefgh
1 
7+
48×
2 mod
1 mod
 
1
2 :
 
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2 
 
 
 
8+
17+
 
19+
12×
3 
1-
0 mod
 
 
 
 
 
 
4 
 
1 mod
14+
3
2
 
6-
 
5 
16×
 
 
 
16+
 
6
12+
6 
 
 
4
0 mod
 
5
 
7 
49×
 
1 mod
 
 
9+
18+
 
8 
 
 
2 mod
 
4
 
 
 

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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