Practice
Champion technique
Hidden Triple
When three digits fit only the same three cells of a unit, those cells hold them. Clear every other candidate from the three 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