Daily Sudoku Competition for May 21
Extreme
by Andrew Stuart
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
G
H
J
3
9
6
1
4
2
8
5
7
4
7
1
8
6
5
3
2
9
8
5
2
9
3
7
4
6
1
7
8
3
6
9
4
5
1
2
1
6
5
7
2
8
9
3
4
9
2
4
5
1
3
7
8
6
6
3
9
4
5
1
2
7
8
2
4
8
3
7
6
1
9
5
5
1
7
2
8
9
6
4
3