PlaySudoku.us
Hard · Puzzle #77
5
2
6
4
3
6
2
4
5
3
2
1
4
7
5
6
9
3
1
8
2
9
2
1
6
5
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.