El Cid: The doubling the points lost is stuped the purpose of the points is to show if they can play not if they are good at realising when they are beet. As for a claim victory option in games like Spider Line 4 I always say good game to my oponent when I have them so they can't possibly win. If it is someone I play a lot of games I will then give them a list of every posible move I and they can make showing they have losts but I do that for those I am trying to teach only.