Is there any easy way to know you can win a pawn just by applying pressure on the opening? So, if you guys can help me with examples of winning pawns just by applying pressure on each phase, opening, middle game and endgame, I would be very grateful. Also, when to apply pressure on the endgame?
Thanks for the attention.
Edit: Sorry for writing mistakes, it is really hard to write on the phone.
I am sorry to say that the answer is "no", there is no "easy way" to apply pressure and win a pawn in the opening, otherwise, at the top level of chess, the game would be won every time. That is what positional chess is about: You gradually improve your position until the opponent can no longer save all of the material.
A theorem of chess is that you must be better to "attack", or even to apply pressure in a specific area of the board, you have to be better in that area. Being better in a specific area of the board, or the whole board, is a result of good positional chess on your part, or bad positional chess by your opponent.
Usually, players do not start getting a good grasp of positional chess until they are about 1800 over the board (not just online).
Probably the easiest way to win pawns is to cram thousands of tactics problems, and get better at those, so when your opponent drops material, then it is easy to see it, and take it.
I am not going to get into a long explanation of positional chess since there are currently 374 other questions about it, and I know that I have discussed it at length before, but I will leave you with one link to a question I answered.
It's possible to win a pawn in the opening, but because it is the opening (i.e. heavily analyzed), you can't do it by force. You can only do it if the other side lets you.
The Two Knight's Defense with 4. Ng5 is effectively a pawn-up opening for White, although it's not obvious. You might want to take a look.
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 {Starting position of the Two Knights} 4. Ng5 {This practically wins a pawn by force, but Black gets active counterplay in compensation.} d5 {It's this or the even more audacious and tactical 4...Bc5, giving up the f7-pawn for activity.} 5. exd5 Na5 {5...Nxd5?! is a "well-known bad move", since White gets to play 6. d4 or O-O opening the center intending a straightforward attack. 5...Nd4 and b5 are alternatives} 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 {Safe square for the Bishop while retaining freedom of mobility for the d-pawn. White could also play 8. Qf3, which wins a second pawn, but after 8...Rab8 Black has some very dangerous compensation.} h6 {Gaining time.} 9. Nf3 e4 {Gaining more time} 10. Ne5 {Black is down a pawn and has the inferior pawn structure, but is way ahead in development, and can now try 10...Qc7, 10...Qd4, 10...Bd6 or 10...Bc5 to try for an initiative before White consolidates.}
You cannot apply pressure on an opening. You apply pressure on a weakness which may or may not occur in the opening.
Sorry there is no magic way to win a pawn in the opening or the other guys would already have been doing that and there would be no point to ever playing the game.
If you have an edge in position you might be able to apply pressure to win material in the middle game.
In the end it is more likely to be tactical than applying pressure.
