Immobile spin

Related terms

• All-spin →

  A ruleset that recognizes spins with pieces other than T. Recognition and rewards vary by game. Stacking Lab's TETR.IO rules use an immobility check for non-T pieces; its Tetris 99 rules do not award those spins.

• Three-corner rule →

  A common T-spin test: at least three diagonal cells around the T's pivot are occupied, together with the required final rotation. Corner orientation and the kick used can determine full versus Mini classification.