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How to solve Videos Forum Timed Rankings Books  PDF Print 24 May 2018
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 87 times
abcdefgh
1 
3 mod

105×

0-

2 mod
7
2 
1-




1

2 :
3 
4-

10+
1-
9+

0 mod

4 

7




240×
5 
56×
10+

2 mod
3-



6 


0 mod

5
1-

4-
7 
0 mod


0 mod

7
4 mod

8 
4
1-

5 mod

8

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 some more explanations.

total
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