Practice
Champion technique
Hidden Pair
When two digits fit only the same two cells of a unit, those cells hold them. Clear every other candidate from the two cells.
1FocusOnly what mattersNext
Start2Notes givenFull grid, notes filled inLocked
3Your own notesFull grid, you make the notesLocked
4Against the clockHow many in a row?Locked
5 right in a row passes a level