In the FIDE Dutch Pairing System, a "float" is when a player is not paired against an opponent with the same score.  A player "downfloats" when he is paired with an opponent in a lower score group, and a player "upfloats" if he is the opponent of a downfloating player.  A player who has no opponent (such as a game with a forfeit or a bye) is also considered to have had a downfloat.

    The FIDE Dutch Pairing System takes into account a player's recent floats (in addition to a player's previous opponents, score and color history) when making pairings.

    The following float abbreviations are used by the SwissSys pairing program, developed by Thad Suits.

Float information here (and in the wall chart and pair chart if desired) is shown according to the following conventions:

          U = Player just had an upfloat.

          u = Player had an upfloat two rounds back.

          D = Player just had a downfloat.

          d = Player had a downfloat two rounds back.

          x = Player is ineligible for the bye (not shown in wall chart.)

Colors due are shown using the following conventions: w = mildly due white (due white for alternation); W = strongly due white (for equalization); WW = due white to avoid three consecutive colors or other illegal imbalance. And similarly for players due black.