There used to be no powerful queen nor high range bishop either, so all of these rules and pieces "evolved" through time.  

There is a movie called "Shatranj Ke Khilari" (The Chess Players) a film by Satyajit Ray.  An entertaining and historical film depicting the tension between India and Great Britain in the early 1800's.  They played in this old way until...   I believe you can find it on youtube. 

Look up the site's FAQs for how to post games if this is what you're wondering about.

can anybody post a game as an example ?

Actually what I'd like to ask is, what was Chess like before this rule was accepted? Are there any famous games which could have ended very differently if this rule was allowed back then. Games in which the deciding factor was or could have been a player preventing their opponent from getting that passed pawn?

"en passant" (or "in passing") rule was made only to "balance" the rule which states how a pawn may move two squares forward on its first move.

 Naturally, if you choose to move a pawn two squares, you will sometimes find your pawn sitting next to an enemy one on the same rank.  Out of "fairness" or like I said, "balance", you should have a right to capture this pawn so it does not become (quite suddenly) a passed pawn! You have only a one time opportunity to capture something in passing and so this is why you cannot capture the pawn on a later move in this way.  The pawn is captured like it had only moved one square forward with it's opposing pawn replacing it on that square.  

Egzactly, @Popcorn179.

So why did they introduce the rule of 'en passant'?

00diaz00 must be right because I was once checkmated this way on another internet site and I could not capture e.p.  I just thought it was a glitch.  As for my last post; I just couldn't help it, lol.  

ok lol, just for the fun of it i will dg into the official rulebook again 2 proof my point.

When u put the king in check with a pawn the en passant is allowed.

But if the king cannot escape the check and is put in checkmate by a pawn the en passant is not allowed... The reason for this is because u can hit the pawn en passant AS IF IT HAS MOVED ONE STEP. Therefore en passant was not allowed when the king was put in checkmate in this fasion. This is a very old rule, just as old as en passant is...

If u can gimme a couple of days i will find it and post it h ere with the source ;)

"Don't have time for that poojashuklacool, but I can show you my favorite mating positions... " - thought_control

Get a life.

Don't have time for that poojashuklacool, but I can show you my favorite mating positions... 

I have no proper idea about passant move.Is there anybody who can help me to understand it?

Okay so for the rulebook on fide is somewhat a bit easy written. But as u can c here: http://www.fide.com/component/handbook/?id=124&view=article

Article 5: The completion of the game

Captured a pawn if it's my plan to gain, position, exemple double pawn on the file, or gain a pièce important. Or possible checkmat. Only if interessant for me.

I heard that you have to pass into enemy squares, is this true?

This is what the FIDE rule book (on the web says):

The game is won by the player who has checkmated his opponent’s king. This 

immediately ends the game, provided that the move producing the checkmate 

position was a legal move.

b. The game is won by the player whose opponent declares he resigns. This 

immediately ends the game.

I think the crucial thing here is to establish whether en passant is a legal move.  The following is also in the FIDE rule book:

A pawn attacking a square crossed by an opponent’s pawn which has advanced two 

squares in one move from its original square may capture this opponent’s pawn as 

though the latter had been moved only one square. This capture is only legal on the 

move following this advance and is called an ‘en passant’ capture.

From the above, I suggest that it is perfectly legal to checkmate using the en passant capture ...and with that, I rest my case.