how to know relative score/value of a pieces

Hi

Many player talks about that relative score/value of a pieces in specific position.

how to know/understand relative score of a pieces ?

The value of the pieces defines how good a piece is. According to the value you should be able to not give away good pieces. The points themselves is not important

Hi,

Basically, the value of the pieces are an estimate so you can evaluate trades and such. There are no "points" in chess per se, but in general here are the values:

pawn = 1

Bishop = 3

Knight = 3

Rook = 5

Queen = 9 or 9.5 (depending on who you ask)

King = priceless, but some estimate it has a "fighting" value of 4 pawns in the endgame.

Also here's a video that go into a little more detail on the value of the pieces.

Hope that helps.

these points I know but I was looking for relative potential not the actual one. 

how to know / identify them properly?

See how many squares a certain piece controls and see how many squares another piece controls. Or see how many important squares that piece controls. 

I found an interesting site with values for chess pieces:

http://www.chesshouse.com/club_tournament_chess_pieces_s/169.htm

Ideally a piece is influencing important squares, from a safe place (can't be chased away), it has mobility, and is not blocking the mobility of your other pieces.

To more easily spot which squares are important to influence learn about middlegame strategy and endgames.

Oh, I get your question now. I think it depends on a few things of course and every chess position is slightly different. However, here are a few factors that may influence it. I know computer chess engines have algorthms that do this, but here is just something you can think about in your games:

1. Scope - how many squares it controls. For example, a knight on an outpost on d5 vs. a knight on a3 is much more valuable. 

2. What it's defending or attacking. For example, a piece defending key squares is much more valuable than one that is not. 

3. It's coordination with other pieces. For example, a bishop lined up in a battery with a queen is more valuable than a bishop that is on its own. 

I think it is very specific to the position on the board. It is hard to generalize fully - which is of course why chess is so interesting. 

Are there particular positions you had in mind? 

Hi

well I have the one right in my mind https://www.youtube.com/watch?v=Fh5z2YFBkHs

it is real exciting because it is done very early stage of the game.

If all your pawns are on black squares it's in your best interest to trade off black squared bishops and bad idea for enemy. Grandmasters tend to prefer bishops over Knights so they don't trade them off. Me personally if a bishop isent that useful I'll trade it for a knight while also stacking the enemies pawns so they are weaker and easier to take later on

If you can trade off the minor pieces and you have an endgame you know you will win then it's good to trade off, with extra pieces the win isent as clear.

basically if your piece isent as useful as your enemies (talking bishops and Knights) it's good to trade it for enemies.