No I am aware he can just play without a Rook which is fine, all I am saying is if you take it every time and lose. See what happens if you don't take the trade instantly. Don't let the fact that a Rook is worth 5 and a bishop is worth 3 fool you. He wants you to take the Rook and you know it. Just go ahead and move a pawn forward to mess up the move he does. I need to look at this on a chess board to see what it would look like, just move to be ahead of his moves. That's what makes a chess player a good chess player.