PlaySudoku.us
Easy · Puzzle #635
6
2
5
1
8
7
4
5
7
6
8
2
1
4
8
9
5
7
8
6
3
4
3
5
1
8
9
3
4
9
2
7
1
1
9
2
7
5
3
6
8
3
9
7
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.
Backtracking — the algorithm most computers use to solve Sudoku — is a form of depth-first search with pruning.