PlaySudoku.us
Medium · Puzzle #644
5
7
4
9
1
4
7
9
3
5
6
8
4
2
1
5
3
8
7
4
9
8
3
9
7
2
1
4
6
3
2
4
6
3
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.