Odd number of teams for Swiss Tourney

[Gerardo]

It should be possible to do one of the following:

 

As an aside does anyone know of a good discussion of algorithms to make a Swiss Draw? I am particularly interested in any tricks to make an algorithm more efficient when making a draw around the half way point - round n for 2n teams - which is where algorithms seem to have problems.

 

Backtracking seems a good way to find a pairing set.

 

Had seen some chess literature, they had added complexity though (alternate colors, dense scoring, floating players).

[Cascade]

Backtracking seems a good way to find a pairing set.

 

Had seen some chess literature, they had added complexity though (alternate colors, dense scoring, floating players).

 

In my experience brute force backtracking can take a very long time in the worst (but relatively) common cases around the middle of the draw.

 

I was wondering if there was anything better.

[benlessard]

If you dont have a break time I would make a round robin without a bye.

 

put team 1 table 1,team 2 table 2, etc.

 

tell the EW to go 3 table (not sure about this) shuffle and play.

 

The first 3 table to have finished get an extra boards. (7 instead of 6)

After each round board go down 2 table and pair go up 3 table (not 100% sure about this)

 

after 6 round every teams has played 6-7 boards vs all other teams.

 

If you need a break in between, putting 3 boards per tables will be annnoying because timing will suck a bit.

[Bbradley62]

Bottom line: There are many good answers, but 5 rounds of Swiss is not among them.