PlaySudoku.us
Easy · Puzzle #867
4
6
2
6
1
4
8
5
9
8
7
3
5
2
6
1
2
5
9
1
4
5
7
4
6
8
6
4
2
5
7
9
3
9
7
8
5
8
3
7
4
1
8
9
3
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