Cut copy

Cut copy (formerly Kiritori Kopi) is an 'investing' technique where you save the T shape underneath the T-Spin. Translated into English, the term means Cut Copy.

The setup is also called 千鳥格子/Chidori Goushi, meaning "A Thousand Birds Grid", whose shape looks like this Japanese art.

General Shape

 * fumen #1


 * fumen #2


 * This variation of the first setup above requires a deeper hole and involves a line clear, but uses S and Z rather than 2 Zs.