A Perfect Clear (PC) means having no filled cells left after a line clear.
How to make a Perfect Clear?[]
This guide tries to give a higher chance of performing a Perfect Clear. The best scenario is to attempt it at the beginning of a game, when your opponent has not finished building up their stack. If you succeed, this usually becomes a K.O.
Note that this guide does not guarantee a 100% chance of success in making a Perfect Clear. It also requires a lot of understanding and practice to make it work in a game. However, failure is not as bad because you can continue making a stack for T-Spin or Tetrises.
The process contain 2 steps.
Create a stack that makes a perfect clear more possible
Look for tetromino combinations that will make it succeed.
Stack for a Perfect Clear[]
This is a stack that makes a Perfect Clear much more likely, since it is built with every tetromino from the first bag and has 12 holes, to fit 3 tetrominoes from the second bag.
In the first bag, I, L, O and J-Block form a square. You can also split the square into an LOJ rectangle and an I-Block separate from the rectangle, which works the same.
S, T and Z-Block form the following shape. Note that you should get T before Z to make this shape.
It is possible to build the stack in other ways.
Mirrored setup:
Using the Next 3 Tetrominoes[]
Assume you have built your stack like this:
The next thing to worry about is what the next 3 tetrominoes will be. Note that you can use the hold piece to hold a tetromino. As a Tetris player, you should know that the sequence is very important in many cases.
Examples[]
LTI[]
A solution is shown here. This solution will work regardless of the order of the tetrominoes. This solution requires an L-Spin. I-Block can be dropped at any time.
Rotate an L-Block counterclockwise and soft drop into the desired position:
Then rotate clockwise once:
Then drop an I-Block (or T-Block if it comes next):
Resulted in a line clear making a Perfect Clear spot for the T-Block:
SLZ[]
For this solution, S should come first. The order of Z and L does not matter. If L comes before Z, it requires a Z-Spin.
Rotate an S-Block and soft drop, then rotate again, as shown:
Then drop L-Block into the desired position:
The hardest part is to do a Z-Spin.
Rotate counterclockwise and soft drop to this position:
Spin counterclockwise again to kick into this position. If the Z piece does not go in, you have it in the wrong orientation. Spin it twice (180) and try again.
