Perfect Clear
Difficulty: Advanced
Clear the entire board for a massive bonus.
A perfect clear (all clear) leaves the board completely empty after a line clear. Pulling one off awards an enormous bonus.
A classic setup uses the first several pieces to fill the bottom few rows without gaps and clear them all at once. Since every piece covers a multiple of 4 cells, you need to calculate the fill precisely for it to work out.
It's difficult and you can't always go for it, but pulling one off when conditions align — like right at the start of a game — can put you way ahead on score.
Related Techniques
Intermediate
Downstacking (Lowering the Stack)
Safely bring down a dangerously high stack to survive a crisis.
IntermediateChaining Combos
Clear lines back-to-back without a break to rack up bonus points.