TETRIS GLOSSARY
Tetris
Also called Quad · Quadruple · Four-line clear
Four rows cleared by one placement, normally using a vertical I. The name also refers to the game itself. A Tetris can leave many blocks behind, while a Perfect Clear leaves none.
View in the A–Z glossary →The I piece fits the last column.
All four rows are full.
Four lines cleared. Blocks above fall down.
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