6–3 stacking

Related terms

• 9–0 stacking →

  Build across nine columns and leave the remaining edge column open for I pieces. Learn to keep the surface flexible without burying the well or depending on a single piece to repair it.

• Well →

  An intentionally open vertical channel for clearing lines, often with an I. Keep its entry accessible. Some older writing also uses well to mean the entire playfield.

• Fractal →

  A connected Double-to-Double structure, commonly made by extending an existing TSD upward while waiting for the next T. Two unrelated TSDs are not automatically a Fractal. Stacking Lab builds toward this from a 6–3 foundation.