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The C-Spin (TKI積み) is a kind of Triple Double Attack. It is invented by TKI. This name is given because of the "C" shape that is formed by the J and L. As the name suggests, it results in a T-Spin Triple which is usually followed by a T-Spin Double within three bags. As an opener, it is most often built with an ZST core whereas L and J are used to build the overhang.
C-Spin Opener
First Bag
ZST Core
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TOJ Core
(TKI signature)
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ITZ Core
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IST Core
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Second and later bags
For the TOJ, ITZ and IST Cores, the placement of the second bag is fixed while for the ZST Core, it is stacked ad-lib.
- ZST Core: There is no fixed way of stacking the second bag, so a player must stack ad-lib. Below is an example, with a Trinity followup in the third bag.
If O comes before I, the below is suitable. Below is an example.
Below are some additional ways to stack the second bag.
- TOJ Core: Only J should come before I. The O, S and Z pieces can always be placed in one of four ways.
- ITZ Core: The S and I should come early and the J, O and L is placed in one of two ways.
- IST Core: One can always stack their second bag like so. However, there are not as many continuations as the rest.
This is a variation of the opener above. The only difference is the O piece is placed on the far right, which allows the second bag to be stacked differently, which is then followed by a Trinity.
C-Spin Perfect Clear
ZST Core
Discovered by player Chopin. If one can manage to get a flat 6-high-mino stack, they might have a chance to trade the T-Spin Double for a Perfect Clear.
If one cannot execute a Perfect Clear after 6 lines, there still may be a chance of a PC after 8 lines. If that also fails, it can be continued with a T-Spin Triple, Imperial Cross or STMB Cave.
TOJ Core
One may assemble the C-Spin Perfect Clear using the TOJ Core.
- O → ZL - PC rate: 95.00 %. This form has better Perfect Clear solutions than the ZST Core C-Spin since the chance of doing a T-Spin Double before Perfect Clear is significantly better.
TZJ Core
Here is another way of stacking the first bag. This will always work if I and Z come early.
This pattern has many continuations depending on the piece order of the second bag.
ITZ Core
- Perfect Clear after 6 lines:
- Perfect Clear after 8 lines:
See also
External Links
- Post about 8-row Perfect Clear Setups, especially C-Spin.