Doerdich: You're whooping me in Extinction Chess and Grand Chess, but if you'd like a couple games of Dark Chess please drop a line. :)

As for his move, I don't see anything wrong with it. Even in regular Chess that opening is pretty famous. Taking a chance is sometimes winning strategy in Dark Chess. Losing strategy too, but that's a different story. d6 for the second move as Black is one of the worst moves you can make! That is unless you've blocked the diagonal to your King from the Queen throwing a check or moved your Queen's Rook Pawn to a5 to throw light on a4. If you're going to move your Queen's Pawn to d6 early in the game and don't want to chance White having placed his Queen on a4, you'd be wise to do it on your first move followed with B c8-d7 on your next move. A common Dark Chess opening and one that you never see in regular Chess. Remember, checks are not announced and your opponent can drape your King and the game is over.