Weekly Extreme Killer Sudoku Competition for May 19 to May 25

Number 661, Extreme
by Crosswords Ltd. October puzzle packs Now Out!. Thanks for supporting our site.
136 people completed this puzzle correctly

1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
5
9
7
6
3
2
8
4
1
2
8
1
7
4
5
6
3
9
6
3
4
8
9
1
7
2
5
3
7
6
5
2
8
9
1
4
8
1
5
4
7
9
2
6
3
4
2
9
3
1
6
5
8
7
7
5
3
2
6
4
1
9
8
9
4
2
1
8
7
3
5
6
1
6
8
9
5
3
4
7
2

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