Author: Vincent Diepeveen
Date: 09:13:00 06/11/04
Go up one level in this thread
On June 10, 2004 at 07:29:24, José de Jesús García Ruvalcaba wrote: >On June 10, 2004 at 00:29:00, Vincent Diepeveen wrote: > >>On June 09, 2004 at 18:25:36, Dieter Buerssner wrote: >> >>>On June 09, 2004 at 08:23:00, José de Jesús García Ruvalcaba wrote: >>> >>>>It actually implies that for any number of players, we can find swiss pairings >>>>up to n-3 rounds (you may assume n is even, if n is odd it is sharper and up to >>>>n-2 rounds). Of course I am assuming no dropouts from the tournament and other >>>>irregularities. >>> >>>Do I understand you correctly, that this is independent of already played >>>rounds, and however they were paired. Let me give an example with 14 players >>>(a-n) and 8 or more rounds. Say the first seven rounds were (color and results >>>etc. ignored): >>> >>>1: a-h b-i c-j d-k e-l f-m g-n >> 1-0 0-1 1-0 0-1 1-0 0-1 1-0 (which will be about first round result anyway) >>>2: a-i b-j c-k d-l e-m f-n g-h >>How can H play G in round 2? >> >>Please show a possible result in round 1 that makes it possible. >> > >All games drawn. Colors for the second round would be inverted, of course. Statistical there is 0.01% chance for that or so... So no valid assumption. >>Swiss pairing is a very complex system. There are very big books about it and >>many analysis done. Average book is hundreds of pages about it. >> >>Please show results with the pairings to proof *any* point. >> >>Also you skip one of the most improtant things in swiss that's color >>alternation, which is *crucial* for the pairing to be done correctly and forms a >>huge problem. However it completely will make impossible many pairings and >>reduce the possible pairing tree drastically. >> >>>3: a-j b-k c-l d-m e-n f-h g-i >>>4: a-k b-l c-m d-n e-h f-i g-j >>>5: a-l b-m c-n d-h e-i f-j g-k >>>6: a-m b-n c-h d-i e-j f-k g-l >>>7: a-n b-h c-i d-j e-k f-l g-m >>>8: ??? >>> >>>Now, how do you pair the 8th round? >> >>>Regards, >>>Dieter > >You can probably try with a pairng program or ask an arbiter, but posible the >color rules can produce Dieters scenario if all the games are drawn in the first >seven rounds (I am not sure). Yes you are not sure because it's impossible pairings. >José.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.