Can there be a function to generate some common mid-game shapes? Examples are STSD, MID-DT-Cannon, Imperial Cross etc.

[dezhonger]

Description:

I know the current Cover feature can do that. But when I wanted to see how to generate STSD and Imperial Cross at the same time, I had to run the Cover function several times. So I would like to have a function to generate commonly used shapes (usually using t-spin multiple times)

Noun explanation:

STSD: https://four.lol/methods/stsd
imperial cross: https://four.lol/methods/imperial-cross/
DT cannon: https://four.lol/methods/imperial-cross/

reference:

You can find more of the shapes I want to describe in the method category on this site:
https://four.lol/#:~:text=*-,Methods,-The%20recognition%20of

[knewjade]

@dezhonger I still don't have a picture of what you want to do. so let me ask you a question.

when I wanted to see how to generate STSD and Imperial Cross at the same time

Could you write a sample of the inputs/outputs you envision? I could not imagine a situation where STSD and Imperial Cross are generated "at the same time".

[dezhonger]

I am very sorry for my unclear description.

The following is an example of input and output：

input:
https://harddrop.com/fumen/?v115@RhD8CeG8CeC8JeAgH

output:
The yellow brick is the result of using the Mino placement entered by the user.

result1: https://harddrop.com/fumen/?v115@5gRpIeQpFeRpAeQpBeD8QpBeG8QpBeC8JeAgH
result2: https://harddrop.com/fumen/?v115@4gRpIeQpCeUpAeTpD8CeG8QpAeQpC8JeAgH (I know this result is impossible to generate. I just give an example to describe the shape of the result I want.)
result3: Maybe some other shape in this (https://four.lol/#:~:text=*-,Methods,-The%20recognition%20of)

I guess this function should be an extension of the current cover function. It may take several or dozens of times longer than the current algorithm to generate the results I want.

[knewjade]

Thank you for your description! I understood the input/outputs. I think this is an interesting idea. We can connect the outputs to setup as follows.

from result1
> java -jar sfinder.jar setup --tetfu v115@5gRpIeQpFeRpAeQpBeD8QpBeG8QpBeC8JeAgH --patterns *p2 --fill o

1 solution

from result2
> java -jar sfinder.jar setup --tetfu v115@4gRpIeQpCeUpAeTpD8CeG8QpAeQpC8JeAgH  --patterns *p2 --fill o

0 solution

The current basic usage of solution-finder is to input a field and pattern and get a new output. So this feature generates next input fields from a field only, which is new and nice.

On the other hand, I didn't think it could be combined with cover. There are two reasons.

1. cover requires a piece pattern, so there is no point in outputting abstract results.
2. The main concept of cover is to output how much coverage by converting it to a binary value of possible or impossible according to the condition.

So I think this feature > setup > cover is the most natural flow.

---

I believe this feature isn't difficult to create. However, the this feature > setup flow has its challenges.

The biggest problem is that it's difficult to decide algorithmically how to place in anything other than yellow. In particular, since MID-GAME can delay placing, it's more difficult to present a specific placement compared to Perfect-Clears/Openings. (The recent pieces can be stacked in unimportant place and the next bag can be used.)

I am sure if we can solve this issue we can improve the setup/cover but I have no good idea right now. Until that is resolved, I will be difficult to create.

[dezhonger]

Thank you for your reply.
I need to correct my previous description. I meant to say "setup", but I remember it wrong, so I said "cover".

“The biggest problem is that it's difficult to decide algorithmically how to place in anything other than yellow”：
I understand whether this problem can be considered in reverse. According to the shape, take STSD as an example. As long as it does not affect me to do tspin, other lattices are filled or not filled.

For this shape:https://harddrop.com/fumen/?v115@5gRpIeQpFeRpAeQpBeD8QpBeG8QpBeC8JeAgH
We can mark the green grid in the figure below as that it must not be filled. The rest of the blank cells can be filled or not filled
https://harddrop.com/fumen/?v115@3gR4RpFeS4QpFeRpQ4QpBeD8QpR4G8QpR4C8JeAgH

Then you can use the setup function to implement it.

[LukasDrakon]

this could also be a feature in spin