I won't take the risk.

[ He says so flatly and coolly, since it's clearly something he's not going to budge on. Other members might have obliged as a "dying" wish, but Ciel had no such inclination. ]

I would say "thank you," but I take no joy in it. Sacrificing one piece for the sake of avoiding checkmate is a loss nonetheless. I would not dishonor him so by taking joy in it. It was only what was necessary to see that we still had a chance of victory.