I invented many chess variants. For some early ones I feel a little ashamed. I think, the most notable of my inventions is the Pentagonal Chess, as I'm one of first people to make a pentagonal game, and the very first first, who used this pentagonal tesselation. I also invented a few triangular variants (I was not one of the first, but i think, I'm one of the first to make straight translation of standart chess into triangles). And just a funny thing by me is "The smallest possible 2D and 3D chess", with only three or four squares.