PlaySudoku.us
Expert · Puzzle #90
9
8
6
6
9
1
1
4
8
2
4
5
2
4
9
1
4
2
7
5
8
9
6
5
4
8
The maximum number of givens in a Sudoku that still leaves the rest logically deducible (no trivial completion) can exceed 77.
The maximum number of givens in a Sudoku that still leaves the rest logically deducible (no trivial completion) can exceed 77.
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.