PlaySudoku.us
Evil · Puzzle #937
6
8
3
5
7
4
9
6
8
1
2
1
6
2
5
9
1
5
4
9
7
4
2
7
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.
Before using pencil marks, see how far you can get on a hard puzzle with pure mental tracking.
Before using pencil marks, see how far you can get on a hard puzzle with pure mental tracking.