There is a Derren Brown (UK Illusionist) piece where he plays seven opponents at once, walking round in a big circle, and amazingly wins 4 out of 7.

Afterwards the explanation is simple - he played 6 masters or grandmasters, and one guy off the street. And simply (!) memorised the moves of player A and made them against player C, B to D etc. All he had to do was play a decent game against the guy off the street and he would always beat 50%