PlaySudoku.us
Hard · Puzzle #633
8
6
1
7
5
4
8
1
1
9
2
8
7
7
1
3
6
3
6
2
4
9
7
6
3
5
"The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane." — Nikola Tesla
"The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane." — Nikola Tesla
The BBC produced a television game show based on Sudoku in 2005, during the height of the puzzle's popularity.
The BBC produced a television game show based on Sudoku in 2005, during the height of the puzzle's popularity.