TETRIS GLOSSARY
4-Wide
Also called 4w · Fourwide · Four-wide
A four-column combo channel beside a built-up stack. Clear with successive pieces to extend the combo. Stacking Lab trains the right-side version: six stacking columns on the left, four combo columns on the right.
View in the A–Z glossary →The channel is four columns wide. Three blocks remain in it here; the six-column side stack supplies the rest of each row.