Here's a number of links for those curious about chess variants. First, a wiki giving a list of many of them, then a wiki about various kinds of fairy chess pieces, followed by a link to arguably the world's chief chess variant website (free membership; members can play variants by an email system which includes diagrams of positions on the website itself). Note that there are wikis out there devoted to single chess variants, or to a single kind of fairy chess piece:

https://en.wikipedia.org/wiki/List_of_chess_variants

https://en.wikipedia.org/wiki/Fairy_chess_piece

http://www.chessvariants.com/