I just saw this video of magician Derren Brown playing simultanous chess against 9 very skilled players.
The video can be seen here
Here is a summary:
Before the match he gave one player an envelope.
He wins the match 4 - 3 with two draws.
He asks the player for the envelope, opens it, and on it is written a number. The digits in this number corresponds to the number of pieces the players have left. (With one mistake.)
In the end he explains that the reason he did so well against the first 8 players is that he copied their moves, so they really played against each other. Simple enough.
But how in the world did he make the number of pieces fit? And how did he beat the ninth player? Is it all a setup?