PlaySudoku.us
Easy · Puzzle #690
6
4
3
8
5
6
7
9
2
6
9
7
8
3
1
5
4
2
4
5
8
7
1
3
8
5
9
1
4
1
7
2
8
9
5
2
1
3
8
5
6
5
4
1
6
8
3
4
7
"Look deep into nature, and then you will understand everything better." — Albert Einstein
"Look deep into nature, and then you will understand everything better." — Albert Einstein
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.