Yackspin

Under construction

Yackspin is a troll TKI followup created by 2 French players named YackTenebreux and Trixciel. Although some people might find this setup viable for competitve play, it's mainly used to show off your SRS+ knowledge. It's with noting that this only works if the game has a 180° rotation button with specific kicks (like on Tetr.io). Yackspin is a TSD>TSD>TST>TSS opener with multiple Polymer T-Spins.

1st bag
After building a TKI Flat Top, and clearing the T-Spin, you should be left with this shape:

2nd Bag
A T must be wasted. This setup requires to stack pieces high up the board in the 1st bag, and that's the main liability that comes with it.

First route

T or I has to come before L or J.

Second route

Early S

3rd Bag
A Fin T-Spin Double is needed to go further down this road. It requires a specific rotation sequence.

With the spin logic out of the way, here are a few patterns that leave you with an OK stack. If you can't do any, you should try to build the best you can.

First route

Early S/Z

Early L/J

Second route

This route is pretty easy to deal with. No patterns for the moment, but it is not hard to freestyle.

4th Bag
From this point onwards, the only thing that matters is the Iso T-Spin Triple or TrIso T-Spin. The other pieces can be placed as the player wishes.

After a Yackspin
There are quite a few options a player can choose after a Yackspin. There's no particular continuation, but the player could definitely take the T-Spin Single, increasing their Back-To-Back by 1, and leaving them with a 0-9 stack.