PlaySudoku.us
Medium · Puzzle #290
9
5
7
9
5
3
2
1
6
6
4
8
9
3
8
2
9
7
6
3
4
1
7
7
1
8
2
4
2
9
8
In Japan, Sudoku is most popular among office workers and is often solved during commutes on trains.
In Japan, Sudoku is most popular among office workers and is often solved during commutes on trains.
"The essence of mathematics lies in its freedom." — Georg Cantor
"The essence of mathematics lies in its freedom." — Georg Cantor