“Such an exhibition is often referred to simply as a Simul”

  A strong player takes on 20, 30 or more players at once, playing on each board in turn. If he/she plays all the games without looking at the boards, it is called a blindfold simultaneous display. No Chess clocks are used.

  The world record for the greatest number of participants in a simultaneous exhibition is 310 players, and the record for the most games played simultaneously by a Chess master (who was playing all the games blindfold) is 62 games.

  The boards are usually arranged in a large circle or square and the player walks from board to board in a fixed order. Each individual participant is expected to make a move when the player arrives at his/her board.

  The exhibitor may pause briefly before playing his/her move, but will typically attempt to avoid lengthy pauses because too many such pauses will cause the exhibition to continue for an extended period. Longer exhibitions increase the risk of fatigue-induced blunders on the part of the exhibitor.

  This especially happens since the individual participants remaining at the end tend to be the stronger players who represent the exhibitor's most challenging opponents. As games are finished off, they are usually not replaced and only a few games will remain in progress at the end of the exhibition.