Weekly Extreme Killer Sudoku Competition for Jan 20 to Jan 26

Number 644, Extreme
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Future Puzzle - will be submitted on the relevant day

1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
11
13
14
21
 
18
12
 
5
 
 
 
 
 
 
11
 
 
6
 
10
 
 
35
 
15
20
14
 
 
 
 
 
 
 
 
17
17
 
 
 
20
 
 
 
 
11
 
 
 
16
 
7
 
 
 
12
 
17
23
 
8
 
8
15
 
 
 
 
8
9
12