I enjoy playing chess and thought that I knew all of the "rules." However, I just found out now something interesting but remain very confused regarding what exactly the "Pawn" is able to perform. This may be hard to understand, but as we were playing, my opponent that I was playing against had eventually moved one of his "Pawns" almost to my end of the board (more than half way) and then took one of my pieces using some kind of a crazy format move. I had always thought that in order for a "Pawn" to take an opponents piece, it had to take it with using only a one diagonal square move. In this particular case, he moved his "pawn" in two spots using a two step process, one diagonal and then one forward and then he took one of my pieces, which I had thought was in a very safe position.
What was this?