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", which shape looks like this Japanese art.

Generic Structures

Cut Copy has two types of generic structures. Both types are considered Cut copy because both of them consist of a T-Spin "cut" by another T-Spin.

The first type of Cut copy is the one where only the bottom-half of the second T-Spin Double is saved underneath. Many player considered this type as the "true" Cut copy. As the second type of cut copy isn't really cut, it is also called "Uncut copy".

• fumen #1

The second type of Cut copy is the one where the whole second T-Spin Double is saved underneath. It could be easily mistaken with STMB Cave.

• fumen #2

Variations, Other Uses and Comparisons

• Cut copy could be made using pieces other than the generic structure and still maintains the same function as long as the structure is similar to those.

fumen #3

Compare the variation of Cut copy above with STMB Cave.

• This variation of Cut copy requires a deeper hole and involves a line clear, but uses S and Z rather than 2 Zs.

Compare the variation of Cut copy above with Parapet.

• Repeating the second type of Cut copy is possible although it is adequately hard to detect the opportunity of doing so.

There is actually a repeatable pattern to the Cut copy variant shown above which was introduced by player yakine that could make it potentially easier for players to see the opportunity for creating it.

• Even though it is very difficult to see the favorable occasion of making this, it is possible to mix both types of Cut copy to make three consecutive T-Spin Doubles.

• Using Cut copy along with Donation could help getting an efficient pieces usage.

• It is possible to make a Cut copy underneath an STSD.

Compare the second type of Cut copy with Fractal. The first T-Spin Double is just shifted one column.

See also

• STMB Cave
• Parapet
• Donation
• STSD
• Fractal

External links

• presentation by Malady on T-Spin.
• video by yakine on various T-Spin patterns.