PlaySudoku.us
Medium · Puzzle #509
1
6
8
2
4
6
1
3
6
7
1
5
3
7
4
1
5
2
8
9
5
7
6
7
4
8
5
9
1
3
3
4
7
6
3
2
4
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.