Concept of positional chess

Hi everyone!
I always heard of the terms "positional player" and "positional chess", but i don't know what they mean, and how positional players differ from defender ones. Can anyone help?

@Mhdfrs , what do you mean "defender"?
Positional chess is the concept of making sure that your pieces and pawns are as useful as possible. This means trying to keep your pawns structure intact, give your knights good outposts, give your bishops good diagonals, and give your rooks open files.
It is of course more complicated than this, but this is the basic idea.

People tend to distinguish positional chess vs. tactical chess and attacking chess vs. defending chess though the notions are unclear.
Positional chess is meant as play to win by occupying important squares with pieces.
An example
www.chessgames.com/perl/chessgame?gid=1102400
Defending chess usually involves accepting some gambit pawn and then defending against the attack so as to simplify and win the endgame with the extra pawn.

'While combinations call for an unexpected reappraisal of values, positional play, on the other hand, emphasises and strengthens them' - Emanuel Lasker. (Quoted in 'Positional Play' by Dvoretzky & Jusupov)

"Tactics is to do something when there is something to do, strategy is to do something when there is nothing to do" some person i don't remember

nice quote by lasker.....those old guys, like capablanca, had interesting things to say, sometimes in simpler terms than we like to use today...

One way to get started learning "positional chess" ideas is to first learn the features determined by pawns. Then you can learn a classification of the pawn structures themselves. See my studies:

Intermediate: Features Determined by Pawn Structure


Intermediate: (Soltis) Pawn Structures