When you set up a session of bridge, there are an intended number of boards to be played by each pair. So if you decide to play 7 3 board rounds followed by a 2 board round for reasons of time, and there is a missing pair, some pairs will play 23 boards, and those that sit out will play 20 boards [or 21 if a pair sits out during the last curtailed round]. On each one of those boards a score is recorded in one of the following three ways, as a matter of Law:
- the result at the table is put in as a score, or
- an adjusted score awarded by the TD is put in instead of the result obtained at the table, or
- an average is put in where a board scheduled to be played is not played for any reason, ie Ave, Ave+ or Ave-
Not played is used for boards that are not part of the movement. For example, in the above case, it could be set up in the computer as 8 3 board rounds, and then the final board of the session at each table could be entered as Not Played.
There have been some suggestions that where a board is to be played late Not Played is entered which will be changed later: this is obviously fine and does not affect the rules.
In my view, changing the basic Laws to include Not Played for any reason whatever in the case of a board scheduled to be played is
- totally unnecessary, and
- a distortion of the fairness of the scoring
Why is it a distortion? Because the scoring is based on comparing people over a set number of scores: Not played changes that, and gives anyone who gets a Not played a slight advantage if they wish to be top [or bottom] since more extreme scores are easier over fewer boards.
If you are doing well in a duplicate in a club, and that club gives Not Played to boards that cannot be played, it is to your advantage to slow down and play fewer boards.
So I suggest that the current method of giving an Average for any scheduled board that is not played is fairest and should be retained.