QUOTE(JimothyJImothy @ Apr 28 2019, 11:37 PM)

I saw the 3 wide 8 tall perfect clear build that okey posted which inspired me to look into it more and find an easy way to get a perfect clear without having to memorize hundreds of solutions. I've made

this fumen to show the various ways to build it and the 3 main ways to get a perfect clear. Hope this helps.

Sorry for late reply, I was on HD hiatus (and I will still be for the next month). I tried out your setup and it indeed works in one of the listed ways most of the time (> 90 % I would say). So, 3-wide PC is better than 4-wide PC. However, I wouldn't know any situation where it's useful to use a combo PC. Getting a combo before the PC is not guaranteed, and even with a 6-combo it will not send that many lines than with T-Spins beforehand.

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I taught my program to find

**2 x TSD setups with holes** and it came up with a case I hadn't thought of previously: How about making the odd clear during the second bag? There are only very few setups where it's possible but it turns out very well one time.

May I present you:

**Okey's Castle Top continuation**. I haven't seen this TKI continuation before and if it's still unknown to the Japanese community, then I want to claim its name. In my opinion it's the best way to reach a 8th row PC after using T-Spins. The secret is that you still complete the 6th row in the second bag - with an odd number of empty cells in the 5th row. The holes that are made are just temporarily - they will disappear after that line clear.

Here are some ways to reach a PC (

**PC solutions**). Some of them may result in a T-Spin Single beforehand (18% of all third bags can result in a TSS -> PC). Only the first 7 solutions are needed to reach a PC with the help of hold and softdrop. The numbers mean the amount of bags where each solution is applicable (first number without hold, second number with hold, there are 5040 different bags).

Here are all ways to place

**2 pieces** that will guarantee a PC for all further piece orders.

**81.9 %** of all bags start with one of the listed piece combinations (if you use hold).

Here are some ways to place

**3 pieces** that will guarantee a PC for all further piece orders. The numbers in the fumen mean the amount of bags where they work (with hold) where the 2-piece combinations didn't work. A '?' means that all those bags can be covered by other 3-piece combinations that can be used more frequently. So, the purpose of the '?' solutions is just to reduce the amount of used softdrops or to leave another piece on hold at the end of the third bag.

**96.9 %** of all bags start with one of the listed 2-piece and 3-piece combinations.

Here are some ways to place

**4 pieces** that will guarantee a PC for all further piece orders.

**100 %** of all bags start with one of the listed 2-piece, 3-piece and 4-piece combinations.

Here are some

**other setups that clear the 6th row** in the second bag - or prepare that clear for the most part. None of those setups are really useful in my opinion (well, except for the TKI Fonzie ones maybe - but TKI Castle Top can be stacked instead of TKI Fonzie every time). The four listed percentages stand for the following PC rates (in this particular order): standard, no-hold, first-3, first-2.

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Some time ago, I made a HTML output for 2 x TSD -> PC setups. Here's an updated one, including setups with holes. See the readme file.

PC_after_2_TSDs.zip ( 220.54k )

Number of downloads: 2**edit:** changed the attachment a bit (6 lines, min-needs).