chess can achieve a 50% score in simultaneous chess by replicating the moves made by one of his white opponents in a match against a black opponent, and vice versa; the opponents in effect play each other rather than the giver of the simul. This may be considered cheating in some events such as Basque chess. This can be used against any even number of opponents. Stage magician Derren Brown used the trick against eight leading British chess players in his television show. In most simultaneous exhibitions, the player giving the exhibition always plays the same color (by convention white) in all matches, rendering this trick ineffective; even with a mixed group, attempting to use this in an in-person circle is rather obvious due to more delayed moves than usual, as the player must always look at a given board, not make a move immediately, mirror the move seen on the opposite board, wait for the reply, then send the reply back to the original board. See also Cheating in baseball Cheating in poker William Hartston - author of How to Cheat at Chess References Bibliography Cheating