Sudoku technique: naked pairs
A naked pair is two Sudoku cells in the same row, column or box with the same two candidates. Learn to use them to clear the rest of the unit. Solving techniques Ā· lesson 5 of 7.
The lesson in words
In row 2, the two marked cells can each only be 1 or 6. One of them is 1 and the other is 6. We donāt know which yet, but those two digits are used up.
So no other cell in row 2 can be 1 or 6. Thatās a naked pair.
The outlined cellās notes say 1, 3 or 6. Take away the pairās 1 and 6.
Try it: Fill the outlined cell.
Two cells, two digits: no one else in the unit can have them. Next: pointing pairs.