Tetris: Double Perfect Clears

Lately my blog has turned into where I share my best Tetris discoveries. I am always amazed to discover something new. Previously I had written about the ET cannon and it’s potential for perfect clears every 14 lines. However it is also possible to perfect clear in the third bag with 100% success. According to Solution finder, there are 83 solutions total and 66 minimal solutions. I have multiple input and output files available to anyone who wants them to see the solutions. Just send me an email at chastitywhiterose@gmail.com and I can send them to you.

You can also view the list of 66 minimal solutions here:

However if you have Solution finder, you can get the same results yourself. Here is the text of the field.txt file.


Run this command to process:

java -jar sfinder.jar path

And you will see that there are more solutions than you would expect. But that is not the end of it. A third bag perfect clear will result in one extra block left over after the perfect clear. This is where the Double Perfect Clear setups come in.

This part of the harddrop wiki specifically is what is relevant.

DPC Setup

The shape which can be made with those extra pieces after the T spin creates this basic shape. Here is a field.txt file for Solution Finder.


There are 11 total solutions and 1 minimal solution. The following is that minimal solution.

DPC Regular Solution

You can see that it is one of the solutions from the wiki. However the other solution can be great too because it means another T spin double.

DPC Regular Solution with T spin

Obviously these methods would be hard to pull off in ordinary gameplay but it remains theoretically possible to use the ET cannon to get an 8 line perfect clear, then use the DPC setup to get another perfect clear after 6 lines. This means that in 14 lines two perfect clears are done.

You may wonder why this is important. The simple reason is that the high scoring potential of perfect clears as well as garbage sending means that someone could score higher in only 70 lines than I would usually achieve in 100 lines. I will have to test out my theory to be sure on this but if my math is correct it would be unbelievably powerful. If I succeed in doing a run of this method outlined in this post I will make a video of it.

You can also view all 11 solutions for the DPC here:
chastitywhiterose.github.io/tetris/solution_finder/dpc regular path_unique.html

There is another page which has more DPC setups that the harddrop wiki does not.

Most notable are those involving an extra T piece which is rare but could happen.

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