Fencer: Filip, my boards have gone back to the borderless style. Now that I've a had chance to see both, I like it this borderless way. I've never had a problem knowing which game is which. Two reasons come to mind for me. One, I don't play regular Chess. Two, you have the name of the type of Chess I'm playing next to the board. It says "Extinction Chess" in bold letters under the left hand corner of the board. Hard to miss that. Ka-boom, eh?

Even though I like how it is being the old style you might want to add something about the borders for the games in the "Settings" page for those that might want different colors for some reason.