PlaySudoku.us
Hard · Puzzle #176
9
3
7
7
9
6
7
1
2
6
3
9
1
4
6
2
7
3
5
2
8
1
6
8
3
2
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.