PlaySudoku.us
Medium · Puzzle #620
8
3
6
2
1
7
5
6
5
9
1
4
5
7
9
3
9
4
5
7
3
9
6
1
4
2
2
4
9
1
4
5
6
2
9
2
5
Mathematical researchers have shown that the minimum number of givens (17) applies uniquely to the standard 9×9 format.
Mathematical researchers have shown that the minimum number of givens (17) applies uniquely to the standard 9×9 format.
When you find a naked pair, check if those same two cells also form a pair in their shared column.
When you find a naked pair, check if those same two cells also form a pair in their shared column.