Difference between puzzle rating and live chess

Strategy i guess, figure out what to do in a calm position, how to improve the position of my pieces. Time limit during a live game is also a big factor that makes it harder. I prefer 90|30 OTB.

hello

From what I saw yet from some books on strategy I have to ask which is my worst piece and how to improve or exchange it. And how to improve coordination of the pieces and how to prevent my opponent to improve his position. Often I see in the analysis after the game that there are quite a lot of moves that I simply don’t understand why I should play them. This is quite frustrating.

As I see my rating in rapid (now again over 1500) is higher than what I should expect from my puzzle rating (around 2300). I did some work on endings and openings (especially with white). 

Bro, I have looked at some of the comments and it seems like very few have my rating difference in puzzles. In puzzles I'm around 2000 high 1900, but it goes up and down. Although in blitz I'm like 690 and "classical" chess (1 day - 7 days). I'm around 1000, does anyone have any tips for me or ideas why this is?

Probably you have to work more with openings principles. If you get lost positions out of the opening it is your opponent who can show his tactical skills, not you. I belong to the few people here who thinks it is a good idea to work on a basic opening repertoire. Doing so you can work systematically on the middlegame strategy arising from the opening. One example for such a basic opening repertoire is John Bartholomew’s 1.d4 repertoire in. Hess able, for free. It is only with 45 lines, but it is more than enough for your level. For black is more complicated to prepare. I play the French against 1.e4 and a Chebanenko Slav against 1.d4 (for this check the book Chebanenko Slav by Colovic, also in Chessable, the free version.  But please note that I am quite weak, around 1500 in 10 minutes games, and between 1700 and 1800 in Daily Chess.

Given your tactical ability, your rating will go up. It just takes time, especially in Daily games.

However, my advice: Don't play Daily and Blitz games simultaneously!!

Every move you play in Daily, you have 24-72 hours to make a move. You get to stare at a position for as long as you want and calculate whatever line pops into your head. When you switch back to Blitz, you can't spend more than 20 seconds on a move.  Selecting a move in a few seconds is preferred.  You will either waste time your Blitz games or blitz out moves in your Daily games. I recommend to choose one and go for it. You can alternate which game type you play, but never both.

In a puzzle, we already know that there is a winning sequence available (or a drawing sequence in losing positions). All we need to do is to find it.

In a game, however, there are many things to consider including the entire dynamics of the game.

More importantly, remember. Just as much as you learn puzzles...

...your opponent probably does the same.

If your opponent outplays you, then you will not be looking for tactics to win the game. Instead, you will be trying to find one path to defend your position.

This is why most players have higher puzzle ratings than game ratings.

Admittedly I’m only 1000 rapid and 2100 puzzles. 

You are right. However, when you are down material you often try to save the game with tactics, like mate or regaining material. I just saw a video where a FM was a queen up (for a knight) and lost because he pre moved (losing a whole rook) and lost the queen for a rook when low on time. There is also the possibility to save the game with a fortress or checks with the Queen. 

Im 800 rapid, 400 blitz and my puzzle rating is 2500. honestly starting to think that solving puzzles doesn't even improve my game

How long time (approx in average) do you spend on each puzzle?

I'm 1000 rapid and 1700 puzzle and I find the puzzles rather challenging.  I typically spend 2-3 minutes on a puzzle before I give up (or make a guess).

They do it to encourage beginners. It's a bit like a kiddies' rating. 

Of course it won't.

Why not? I've heared a lot of experienced chess players saýing that solving puzzles is a very important part of your training if you want to improve your game.

For me,
Puzzle rating around 2100
Blitz rating on here 1097
FIDE rating 624

Being good in puzzles means nothing when it comes to playing chess.

I wouldn’t say this. It means a lot, but opening, middlegame strategy and basic endgame skills are also relevant. Neglecting one of these aspects is bad for your game. It is like to say a motor in a car is not important. Well,  you can’t drive around sitting on a motor - you need other parts of the car. 

Exactly what I said. Tactics are important, but not only tactics. I see a lot,of people playing without even knowing the most elementary pawn endgames, or not knowing anything about openings. Doing so you will certainly not improve. 
Tactics is not only about attacking, it is also important to have tactical skills to defend.