PlaySudoku.us
Hard · Puzzle #237
1
5
6
8
5
6
9
2
6
4
9
5
3
2
5
7
7
1
8
2
3
4
1
6
4
2
"Everything should be made as simple as possible, but not simpler." — Albert Einstein
"Everything should be made as simple as possible, but not simpler." — Albert Einstein
"There is no permanent place in mathematics for ugly mathematics." — G. H. Hardy
"There is no permanent place in mathematics for ugly mathematics." — G. H. Hardy