PlaySudoku.us
Evil · Puzzle #391
7
9
3
6
1
4
2
8
4
6
8
6
1
8
8
4
7
6
3
7
1
8
6
2
4
5
Box-Line Reduction: if all candidates for a digit in a row or column are within one box, eliminate that digit from the rest of the box.
Box-Line Reduction: if all candidates for a digit in a row or column are within one box, eliminate that digit from the rest of the box.
The minimum number of clues (17) needed for a unique Sudoku was proved by exhaustive computer search in 2012.
The minimum number of clues (17) needed for a unique Sudoku was proved by exhaustive computer search in 2012.