Daily Sudoku Competition for May 25
Tough
by Andrew Stuart
1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
3 2 8 1 9 5 4 7 6
6 5 9 4 2 7 8 3 1
4 1 7 3 6 8 9 2 5
7 3 5 6 4 1 2 8 9
8 4 2 9 5 3 1 6 7
1 9 6 7 8 2 5 4 3
2 7 4 5 3 9 6 1 8
5 6 1 8 7 4 3 9 2
9 8 3 2 1 6 7 5 4