TETRIS GLOSSARY
Mirroring
Also called Mirror · Mirrored setup
Reflect a construction left-to-right, exchanging J with L and S with Z. Geometric symmetry does not guarantee identical spawn movement, kick behavior or build order in a particular game.
View in the A–Z glossary →J
MIRRORED → L
A horizontal mirror swaps J ↔ L and S ↔ Z. Mirroring a setup also changes the required pieces.