TETRIS GLOSSARY
SDF
Also called Soft Drop Factor
The soft-drop speed setting. Stacking Lab uses zero to mean infinite, giving an instant non-locking descent. Other games may label infinity differently or calculate the factor against a different speed baseline.
View in the A–Z glossary →1 cell/s × 20 = 20 cells/sExample: SDF 20Base gravity × soft-drop factor
A numerical example only. Infinite soft drop is a separate setting in the trainer.