PlaySudoku.us
Hard · Puzzle #221
8
6
4
7
5
3
7
2
1
4
2
1
5
5
3
7
8
5
8
2
7
6
3
2
5
6
1
"Those who cannot remember the past are condemned to repeat it." — George Santayana
"Those who cannot remember the past are condemned to repeat it." — George Santayana
Wayne Gould distributed his Sudoku software for free to newspapers — he made his money selling puzzle books.
Wayne Gould distributed his Sudoku software for free to newspapers — he made his money selling puzzle books.