Practice
Champion technique
Y-Wing
A pivot cell with candidates XY sees one cell with XZ and another with YZ. Whichever the pivot is, one of those two cells is Z. Rule Z out of every cell that sees both.
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