PlaySudoku.us
Expert · Puzzle #169
3
5
6
4
7
9
8
9
4
6
7
5
6
2
4
7
5
1
8
2
4
9
1
9
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.