PlaySudoku.us
Easy · Puzzle #308
9
8
4
2
1
5
4
6
8
2
9
6
2
1
3
9
5
8
2
9
1
4
3
7
8
4
9
5
6
2
1
4
2
6
8
7
1
4
7
8
3
2
6
4
1
4
8
3
7
2
Sudoku is a constraint satisfaction problem — the same class of problems used in scheduling, circuit design, and AI planning.
Sudoku is a constraint satisfaction problem — the same class of problems used in scheduling, circuit design, and AI planning.
"What is a proof? It is a demonstration that a statement is necessarily true — a guarantee that no exception can exist." — Henri Poincaré
"What is a proof? It is a demonstration that a statement is necessarily true — a guarantee that no exception can exist." — Henri Poincaré