Not only chess, but several variants: Chinese chess (Xiangqi), Japanese chess (Shogi), Barsoomian chess (Jetan), hexagonal chess (played on hexagons of three different colors, with two or three players), four-player chess (played on a board in the shape of a plus sign), and Knightmare Chess (played with a normal board and normal pieces, but also with a deck of cards that allows you to do strange things to your pieces on your turn). I had to make all of the variant boards myself (and pieces, for Japanese and Chinese chess), following the official rules for each.
I've never been tournament level, I just play for fun - although not as often as I used to.
Johnathan