Daily Sudoku Competition for May 31
Tough
by Andrew Stuart
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
G
H
J
6
7
8
1
9
4
2
5
3
9
2
1
7
3
5
4
6
8
5
4
3
6
8
2
1
7
9
8
6
7
3
2
1
9
4
5
2
1
4
9
5
6
3
8
7
3
9
5
4
7
8
6
1
2
1
8
9
5
6
3
7
2
4
7
5
6
2
4
9
8
3
1
4
3
2
8
1
7
5
9
6