Game technique · Sudoku
Hidden Single in Sudoku
If a digit has only one possible cell in a row, column, or box, place it there, even if the cell has other candidates.
🎮 Play Sudoku →How it works
If a digit has only one possible cell in a row, column, or box, place it there, even if the cell has other candidates.
Example
Scan a box for every possible position of 5. If only one cell can hold it, that cell is 5.
Key point
If a digit has only one possible cell in a row, column, or box, place it there, even if the cell has other candidates.