So this is something that came up at a get-together at a friend's house, but it's something that has come up before in our social group, and I was interested to read other people's takes on it:
A reasonably large group of friends (say 10 people) are together in a social setting, and want to take part in a friendly competitive activity. The particular example in this case was board games, but it could really be anything competitive (e.g. a sporting activity or video games). The problem is that one person in the group is significantly better than the rest at the activity in question, to the point where they or their team (if it's a team activity) are virtually guaranteed to win.
Is it rude to ask them not to take part in the activity, or to ask them to take on a neutral role (such as scorer, question-master, banker, etc.)? Should the group simply not undertake these activities? Should the person in question voluntarily bow out, and if they do should the rest of the group allow them to?