en passant


That is so that Diamond Members can use it in their games.

when I try the move it doesn't execute the move. I'll try again then.
are you using version 3??

It is preposterous to argue otherwise

We are talking about chess, I presume.
En passant was never abolished. It is still a rule of chess.
http://www.fide.com/component/handbook/?view=article&id=171
- A pawn occupying a square on the same rank as and on an adjacent file to an opponent’s pawn which has just 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.
- I rest my case.