Perfect Clear Guide

Perfect Clear + Tetris sends 14 solid lines to your opponent

Perfect Clear Guide

Originally on harddrop community.

What is perfect clear ?

Perfect clear is a bonus that is rewarded if and only if you clear all terminos out (including bombs). It sends 10 extra garbage lines to your opponent.

How to make a perfect clear ?

This guide tries to create a high chance of success for a perfect clear. The best scenario is to make it at the begining of the game , so your opponent hasn't finished building up their stack. If you succeed, this usally becomes a K.O.

Note that this guide does not guarantee a 100% chance of success in making a perfect clear. And It 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.

1. Create a stack that makes a perfect clear more possible
2. Look for termino combinations that will make it succeed.

Stack for perfect clear

This is a stack that makes a perfect clear much more likely, since it is built from a combination of every termino and has 12 holes in which fit the next combination of 3 terminos.

It consists of two parts that can be split. First is the 4x4 termino block. You can also split this part into 4x3 and 4x1, which works the same.

Second is the combination of TSZ, which is very important here. Note that you should get T before Z to make this shape.

Which means it is possible to create a shape like this.

or like this

or this

or a mirror one applies to the similar theory(but not the same). Note the difference in TSZ combination.

Combining the Next Terminos for Success

Now lets assume you finished building your stack like the one below:

The next thing to worry about is what your next 3 terminoes will be. Note that you can use the queue to hold one unused termino. As a tetris player, you should know that the sequence is very important in many cases.

LTI

One successful positioning is shown here. This combination will work regardless of the order of terminoes. But L before T is easier, since otherwise you must use an L spin technique.

first, insert L into the position by soft dropping it:

Then spin it clockwise once.

then insert the i termino (or t if it comes up next)

resulted in a line clear making a perfect clear position for the T termino

SZL

In this case S should come first. order of Z and L doesn't matter. But if L comes before Z, it requires a Z spin technique.

If the order is SLZ, it requires a Z spin.(or if your hold queue is empty you should swap the order of this, so it become easier) First insert S into its position.

Then insert L into its position

the hardest part is to do Z spin first soft drop it until this position.

then try to spin counter clockwise to make it go into its position. Sometimes it may not go in. If it does not go in, try to spin around until it goes in. This requires some practice.

TOI

T has to come before O.

OLI

O has to come before L.

TJI

two alternatives depending on what come first.

T before J

J before T. Note this is a tetris along with the perfect clear, so it sends 14 lines!

ZSL

Conclusion

There are more scenarios than this. And if you do a mirror version, you would change the terminos as well. As I said earlier, the success rate is not very high, but if you do it fast enough there is nothing to lose. After failure, you can continue your own play style. Make sure you do this before your opponent sends a garbage line . Have fun with a perfect clear.