Doubled pawns can occur when a pawn makes a capture to a file (column) where there is already a pawn of the same colour. This achievement will most likely unlock within your first game of chess, however there is a very straightforward alternate way to get it. The following video will show you how to get this achievement along with two others:
-From the main menu, go to "Tutorials"
-Go to "En Passant Capture" (Page 7)
-Complete the tutorial by moving the pawn on e5 to f6 (you will need to press
to get through some tutorial boxes first)