qfwfq
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Posts: 29 
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Post by qfwfq on May 13, 2014 16:13:22 GMT -8
Does the International Competition only produce a single winner, or a complete ranking of participants?
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Post by Sam Schreiber on May 13, 2014 16:44:42 GMT -8
In the past, it has often been structured as a double-elimination tournament. Do you consider the results of a double-elimination tournament to be a complete ranking of participants?
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qfwfq
New Member
Posts: 29
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Post by qfwfq on May 13, 2014 23:03:04 GMT -8
From reading about it on wikipedia, it looks like it can rank the first four players (?).
I have vague memories of chess tournaments where everybody played a number of matches and all wins and draws were counted, resulting in a ranking of all participants. Not sure what system it was. (Update: probably the Swiss system)
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Post by Steve Draper on May 14, 2014 4:17:07 GMT -8
Anyone have any updates on when we'll be able to register (to compete for a remote place)? I know there is going to be a qualifying competition (at least for remote places), which obviously has to happen some time before the actual event, so it feels like time is starting to get short...
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Post by alandau on May 15, 2014 18:45:21 GMT -8
Last time (not double-elimination) there was a cutoff at top 5 (intended to be top 4, but the 4/5 slots were very close, so there was a play-in for the fourth slot). Then there was a match for 3rd place, so the top 5 contenders wound up ranked.
The tournament format can change from year to year, though. Presumably there will at least be a complete ranking of players from the qualifying section of the tournament (i.e. compare by total scores, highest scores make it to the finals).
Swiss can produce a complete ranking, but AFAIK no one's run a tournament with the Swiss system yet.
I assume they'll want to have tournament registration available by the end of the Coursera class. They're behind their self-appointed schedule, but that's hardly unprecedented. (Speaking as a former tournament organizer myself...)
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Claus
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Post by Claus on May 25, 2014 9:28:38 GMT -8
From reading about it on wikipedia, it looks like it can rank the first four players (?). I have vague memories of chess tournaments where everybody played a number of matches and all wins and draws were counted, resulting in a ranking of all participants. Not sure what system it was. (Update: probably the Swiss system) From analysis following prior experience in other tournaments, my conclusion is that double elimination only guarantees determining the top two players. Weaker players could end up what seem to be the 3rd and 4th positions (the last players who lose to the top two). the Draw and Process variant, this is immediately evident from the description on wikipedia. Note also that if the top player wins the draw matches and the second player wins the process match, the third and fourth ranked players may not end up as losers of the draw and process tournaments. To see this, consider that the 2nd, 3rd, 4th players are eliminated early in the Draw matches. Then the last loser in the Draws could be the 5th ranked player or worse. Moreover, if the 2nd ranked player is matched against the 3rd and 4th ranked players early in the Process matches, both the 3rd and 4th players may be eliminated and the last loser in the Process matches is again the 5th ranked player or worse. (This argument obviously assumes an idealized world where the higher ranked player always wins. Indeed, the argument that double elimination correctly determines the top two players also requires this idealized view.) The Upper / Lower bracket variant fails to identify the 3rd and 4th ranked players in the same way given worst case pairings for the matches. |
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