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Subject: Re: Pairing question about Ikarus

Author: Mike Byrne

Date: 08:41:28 02/22/03

Go up one level in this thread


On February 22, 2003 at 09:29:47, Rolf Tueschen wrote:

>On February 22, 2003 at 09:25:16, Robert Hyatt wrote:
>
>>On February 22, 2003 at 08:54:30, Rolf Tueschen wrote:
>>
>>>I read 6: Ikarus     3.5 /  6    2b= 13w+  1w=  4b=  3w- 14b+.
>>>
>>>So that means that Ikarus although playing the placed 1, 2, 3, 4 progs, it could
>>>get full points against the last and pre-last. Placed om 14 and 13.
>>>Is this ok? Something seems to be wrong or biased. Point is that a game against
>>>14 is a SURE win. That is as if a top program after a loss or two draws got a
>>>point for free. Note Ikarus had 2,5 pts before playing Matador with 0.5 pts.
>>>
>>>Could some expert explain why such things are still possible?
>>>
>>>Rolf Tueschen
>>
>>
>>Too few programs, too many rounds.
>
>Also, many progs get a "good" result and that is also a good side-effect we
>should consider. What would be the optimal number of rounds for 14 participants?
>
>Rolf Tueschen

4

The optimize number of rounds for a swiss tournament is in the table below--
tournaments should not set their number of rounds until thay know how many
participants.  It very awkward when you do not follow this guideline as the top
place partipants _usually_ will place each other other in the round indicated
below (based on the number of partipants).  After that they start playing lower
rank opponents and then you end up with the situaion that you have.  For the
life of me I am not sure why this is not follwowed more often, this concept is
so simple but it seems like is not adhered to in many cases.  In a single
elimination tournament with 64 partipants where you have a decisive winner in
each event, it will take 6 rounds to determine the sole champion.  College
basketball uses similiar concept in the NCAA tournament.  Start with 64 teams
and after 6 rounds, you have the winner - it's based on the same principle.


# of participants	rounds
6-8	                   3
9-16	                   4
17-32	                   5
33-64	                   6
65-128	                   7

Michael Byrne




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