In Da Vinci Code movie, Teabing (one of the main characters) is a supposed chess master. It's a central point to the movie.
It would make a whole lotta sense that, if GnR did contribute a song to Da Vinci, it might be called "Checkmate". It would also make a whole lotta sense that anyone "making up" a story about GnR might want to ride that same train when creating a song title.
Good point Pilferk. I suppose that if this song is indeed linked to DVC, then we have two days until we find out (US release is May 19th).
I just checked the soundtrack listing, there doesn't seem to be anything but score by Hans Zimmer.
It opens tomorrow in Australia, and I'm seeng it so I'll know by then.