PlaySudoku.us
Easy · Puzzle #669
6
5
3
7
8
1
9
4
3
6
7
2
9
4
6
5
3
5
6
7
1
4
2
4
8
7
2
6
1
3
9
7
6
2
5
9
1
8
6
2
3
6
5
1
"It is not enough to have a good mind; the main thing is to use it well." — René Descartes
"It is not enough to have a good mind; the main thing is to use it well." — René Descartes
A solved cell is most useful in whichever house it brings down to one empty cell.
A solved cell is most useful in whichever house it brings down to one empty cell.