C-Spin

Article under construction

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

TOJ Core (TKI signature)

ITZ Core

IST Core

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. However, if Z can be placed, it is stable. 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: 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, which is then followed by a Trinity.

C-Spin Perfect Clear

ZST Core

This continuation is discovered by the 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 (PC rate: 74.72 %). 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.

• L → I - PC rate: 94.10 %

TZJ Core

Here is another way of stacking the first bag. This will always work if the I tetrimino come early, though TKI 3 is more appropriate for that dependency. The J tetrimino is on hold.

This pattern has many continuations depending on the piece order of the second bag.

• 89.25% (12 solutions)

• 96.90% (12 solutions)

• 80.00% (8 solutions)

• 91.19% (7 solutions)

• 93.02% (10 solutions)

• 89.33% (21 solutions)

• 88.02% (11 solutions)

See also

• Triple Double Attack
• Triple Donation Double Attack
• Opener
• Elite Stacking
• PC-Spin (Okey Version)

External Links

• Post about 8-row Perfect Clear Setups, especially C-Spin.