At the moment, we have trivial pawn structures but it will become more interesting at higher heights.
Most popular pawn structures


Hey Yigor, what is Reti Gambit Accepted's PSCC ? ( 1.Nf3 d5 2. c4 dxc4 )
It's 6C3c*0d in my current notations, the height h=6+3=9. The sign * in 3c* means that this pawn is doubled and there is still a pawn on c7. The white c-pawn is missing which corresponds to the height 6 and notation 6C. The black d-pawn is not missing but passed to the c-file. Since there is no black pawns in the d-file it's noted by 0d.

I am interested in finding out the best middle game strategy relating to each pawn structure.
I'm interested in it too. It's one of reasons why I started this project. Well, such strategies related to pawn structures would be a long and complex story.

I am interested in finding out the best middle game strategy relating to each pawn structure.
I'm interested in it too. It's one of reasons why I started this project. Well, such strategies related to pawn structures would be a long and complex story.
Then you may enjoy reading IM Shereshevsky's books Mastering the endgame Volume 1: open & semi open games and Mastering the endgame Volume 2: closed games.
Despite the title, they are basically strategy manual according to each pawn structure (a must-have).

Obviously, talking about pawn structure, you may be more interested in Volume 2 rather than open games.

you guys do now that the structure will change depending on the opponents opening
I consider it for both sides simultaneously, not separately for white and black.

I continue to add pawn structures and transitions. I'm planning to complete here the case of 10K+ games and pawn structures up to height 4.

I've added KIA: Symmetrical of height h=1+1, KIA: Yugoslav of height h=1+2 and Alekhine: Advance of height h=3+0.

It isn't really necessary for you to create a new classification system because there already is one, although it's not as strict I guess. Why not use a book like "Pawn Structure Chess," "Understanding Pawn Play in Chess," or the new and maybe even more thorough in some places, "Chess Structures: A Grandmaster Guide" by Mauricio Flores Rios and look into the typical pawn structures that the books go over? Rios' book seems to cover a lot more structures than the other books. You can see a snippet here:
https://www.qualitychess.co.uk/products/2/235/chess_structures_-_a_grandmaster_guide_by_mauricio_flores_rios/
You could use chessbase (I don't know if other database programs do this) to search games by structure and chart statistics this way.

penandpaper0089: Yes, it's not necessary as well as it's not necessary to play chess. I'm on holidays, alone at home, and it's my way to spend time. "Chess Structures" is a good book, I looked at pdf, thanks for references btw.
However, there is no codification of pawn structures and no classification of openings by pawn structures. In addition, I prefer to do everything myself, that's my way to study things.
Pawn Structure Classification Codes are defined here:
https://www.chess.com/forum/view/chess-openings/pawn-structure-classification-codes
The PSCC of the initial position will be denoted by I. I divide the set of all chess positions in 96 strata by the pawn height (h). Let's start with the initial pawn structure I, knight moves don't change it. I indicate the number of master games and statistical evaluations. The sharpness is also indicated when sh1 (or sh2) is < 0.5 or >1. At the moment, only pawn structures with 10K+ (K=1000) master games will be listed.
I (h=0)
Transitions: I --> 1G,1g, 2C, 2D, 2c, 2d
h=0+1:
1g
h=1+0:
1G
Transitions: 1G --> 1Gg, 2d1G
h=0+2:
2c
Transitions: 2c --> 2Ec, 2Cc
2d
Transitions: 2d --> 2Cd, 2Dd, 2d1G
h=1+1:
1Gg
h=2+0:
2C
Transitions: 2C --> 2CD, 2Cc, 2Cc, 2C1c, 2C1e, 2C1g
2D
Transitions: 2D --> 2CD, 2Dd, 2Df, 2D1d, 2D1e, 2D1g
2E
Transitions: 2E --> 2Ec, 2Ed, 2Ee, 2E1c, 2E1d, 2E1e, 2E1g
h=1+2:
2d1G
h=2+1:
2D1d
2D1g
2D1e
2E1c
2E1d
2E1e
2E1g
h=3+0:
3E
h=2+2:
2Dd
2Ec
2Ee
(to be continued)