I like the new symbols for the chess variants and I suggest that they be used for the graph as well, instead of the current circles and rhombi which do not indicate the chess variant (without a mouseover ie)
The only thing that's left is a way to indicate if the games are rated or not through the symbols, and a way that can be achieved is by using different shades of color
The only thing that's left is a way to indicate if the games are rated or not through the symbols, and a way that can be achieved is by using different shades of color