the point is not how high my opponent rating should be to make their blunder valid, but how much you learn from playing this pawn structure.
creative ways to improve your tactics.

another pawn structure i copied from wikipedia. this time a king's indian attack(KIA) pawn structure.
this time a little bit higher rated opponent than the previous one.
hopefully, you will enjoy the game.

another spectacular game by me. this time i created a daily game with one day per move with only two rooks and a king in addition to eight pawn.

maybe i can now safely say i have perfected king and pawn endgame.
Hardly that.
Try something a bit more difficult. White to move and win.

maybe i can now safely say i have perfected king and pawn endgame.
Hardly that.
Try something a bit more difficult. White to move and win.
E4

@111deuri Thanks for sharing your tactical wins. It seems that you are successfully incorporating what you're learning into your own games. Good job!
Q: What time control were those games play?

E4
e4 is a good start. What's the whole continuation?
1.E4 2.dxe4 3.d5.
Then bring the king if he tries to queen his queen side pawns. He cannot take d5 since the e pawn will queen. It's won game after that.

https://www.chess.com/puzzles/problem/36642
Try this tactic after black rook captures knight on F7. White to move. I got it in TT, it took me long time.

@111deuri Thanks for sharing your tactical wins. It seems that you are successfully incorporating what you're learning into your own games. Good job!
Q: What time control were those games play?
i am playing like 30 game on the go. every game is a daily game with one day per move

this game i was struggling because of an my early 3...exd4+ capture of a pawn because this gives him access to the queenside pawn.
at the end, you have to admire my defence in this game

No, but it makes it 300 and respectively 800 points better informed. In any case online I am not on same ratings as fide rapid I'm 1950 and longer games 2100. In any case the OP did not play these "games", if you click on analysis icon in those games, you will see they are just some game fragments he concocted up.

i am right now trying to understand the dynamics of two rook endgame.
here is one of the game
hopefully i will master rook endgame after lot of training game like this.

you are tryin to master a certain endgame and you start with an impossible fantasy position where black moves first and you are playing crap moves for both sides, against yourself. There are ways to learn endgames. They're called endgames books written by professionals. Your own ideas about how to learn always fail in chess. You are patzer and will remain one
endgame book are all theories. to have practice i am following my creative method.

https://www.chess.com/puzzles/problem/36642
Try this tactic after black rook captures knight on F7. White to move. I got it in TT, it took me long time.
this type of tactics are difficult to perceive in a game. as a general rule if you cannot solve a tactics within two minutes, you are unlikely to see in a game. i think it is not much of a use to be razor sharp in finding difficult tactics. i think for beginners it would be more benificial if they know how to increase pressure in a position. it is no brainer that lots of people crack under pressure. same psychological factor exists in chess also.
also a lot of people are careless. so they unlikely to smell a advanced tactics.
10..... Kf6?? was the critical mistake that leads to 1-0.
10..... d5!! would have been draw.
There is no point showing mistakes of 1400+.
As a general rule, you learn nothing from opponent mistakes, you learn something from own mistakes.