2
9
6
8
9
5
2
1
3
5
2
9
7
6
5
7
2
5
3
6
1
6
8
5
3
7
6
4
4
2
6
3
2
5
1
7
9
The hardest Sudoku puzzles require techniques equivalent to propositional logic — the same foundation used in computer proofs.
The hardest Sudoku puzzles require techniques equivalent to propositional logic — the same foundation used in computer proofs.
"Winning is not a sometime thing; it's an all time thing. You don't win once in a while, you don't do things right once in a while, you do them right all the time." — Vince Lombardi
"Winning is not a sometime thing; it's an all time thing. You don't win once in a while, you don't do things right once in a while, you do them right all the time." — Vince Lombardi