PlaySudoku.us
Medium · Puzzle #801
4
3
2
6
1
7
5
2
8
8
7
4
9
2
3
7
5
1
2
6
9
2
4
8
5
9
4
7
4
7
3
6
9
8
4
5
3
The first Sudoku software app appeared in 2005 and became one of the most-downloaded mobile apps of that year.
The first Sudoku software app appeared in 2005 and became one of the most-downloaded mobile apps of that year.
"If I have seen further, it is by standing on the shoulders of giants." — Isaac Newton
"If I have seen further, it is by standing on the shoulders of giants." — Isaac Newton