Harry Potter Chess Game

This Pejman Yousefzadeh post caused me to do a google search which led to finding this theory that the plot of the Harry Potter series is foretold by the chess game at the end of Sorcerer's Stone. I can see where it's coming from, but more than anything else it reminds me of claims for Nostradamus: It's all vague enough that it could probably mean just about anything that involves death and sacrifice. And is Ron really the one directing things? I also don't see a pawn taken in the book.