Tetris Wiki

MKO Stacking is a technique that usually results in a Perfect Clear after 4 cleared lines or 2 T-Spin Doubles within the first two bags. Unfortunately, both L and J are required to come early in first bag and the first T-Spin cannot be entirely prepared within the first bag. So, if T the piece comes first in second bag, the player is stuck with 2 T pieces and must use one to make the T-Spin overhang (provided the PC does not work which is always the case of a late second O). Otherwise, the T-Spin overhang can be made with the S or Z pieces. There is a decent but hard-to-spot Perfect Clear opportunity after 8 cleared lines, if the pieces are stacked like shown in the fifth picture.

szi
sszzi
jszlooi
jjjlllooi

Perfect Clear after 4 lines[]

GTTTSSGOOG
GGTSSGGOOG
GGTTTGGGGG
GGGTGGGGGG
GZZTTTGOOG
GGZZTGGOOG
GGTTTGGGGG
GGGTGGGGGG
GLLTTTGOOG
GGLTTGGOOG
GGLTTGGGGG
GGGTGGGGGG
GTTTJJGOOG
GGTTJGGOOG
GGTTJGGGGG
GGGTGGGGGG
GLLIJJGOOG
GGLIJGGOOG
GGLIJGGGGG
GGGIGGGGGG
GllTTTGOOG
GGlJJGGOOG
GGlJTGGGGG
GGGJGGGGGG
GJJJSSGOOG
GGLLLGGOOG
GGLSSGGGGG
GGGJGGGGGG
GZZLLLGOOG
GGJJJGGOOG
GGZZJGGGGG
GGGLGGGGGG