Medium printable sudoku
Note candidates in an area with no immediate answer. If a cell allows {2, 7} and its column already contains 7, only 2 remains.
Ready to print
Levels
- Medium
- Locked candidates and pairs
Try an example
Note candidates in an area with no immediate answer. If a cell allows {2, 7} and its column already contains 7, only 2 remains. Recheck its row, column and box after every new digit.
What to check
Also look for a digit that has only one possible position within a row, column or box. The number of given digits alone does not determine the challenge; their relationships matter too.
Write only what you can justify
Compare the row, column and box before entering a digit. If several options remain, note them as small candidates and return later. An entry is confirmed by the board’s rules, not by making a row look neatly ordered.