Teach Me En Passant

@Tenakel said in #3:

The tricky move "En Passant" can be very dangerous and should always be carefully considered, otherwise it can lead to unpleasant surprises.

You put the "??" on the wrong move. It should really be 3. Qh5?? because everyone knows that after 3...d5 en passant is forced!

@Geelse_zot said in #13:

You will be tempted to grab enpassant whenever you can, but remember it is not forced. Some people will disagree ;)

Ah, you predicted my post!

Google en passant.

<img src="https://lichess.org/2ry8Z1ON#0" > </img>

@TALENTEDmASTER

Click the link above. You will arrive at a position where White has just played Bh4 to attack the queen. Now it will be wrong for
Black to play g5 to interpose, because White will reply hxg6+ e.p ; when Black is forced to answer the check by fxg6, White will
snatch the queen and win the game.

There are three rules for applying en passant move:

1. The Capturing pawn must be on its fifth rank.

2. The captured pawn must be on an adjacent file and must have
   just moved two squares up (double step)

3. The capture can only be made on the move immediately after the
   opposing pawn makes the double step move. Otherwise the "right
   to capture it en passant" is lost.

Now you see the above diagram once again. All these three rules
apply.

Best of Luck
shankss2018
thirushankar1108@gmail.com

Yes, if you remember @betternever 's post you'll be good.
Summary: If your opponent moves a pawn two squares and you could have taken had it moved one square, then you can capture on the 1-move square immediately after their move (but not on later moves).