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Wimbledon Odds; Seeding Tournaments
Posted By: Henrik Bukkjaer In Response To: Wimbledon Odds; Seeding Tournaments (Bob Koca)
Date: Tuesday, 28 June 2011, at 1:42 p.m.
Bob - you're not getting this right.
Because I didn't explain it, really :-)
In some of the Swiss/Monrad tournaments (Danish Doubles Championship to mention one), instead of "adjusting" with tournament performance (as you'd do in regular Monrad), we adjust with the opponents rating.
That is, we think that your rating is a better measure of your strenght, than the few games you have played in that particular tournament. Bear in mind, that the DBgF rating contains all "live" Danish matches played, for the last 25+ years.
Now, an example: In regular Swiss/Monrad, if two "sides" (doubles or singles) have won 5 of 8, and you have to break a tie between the sides with 5 of 8 (say it's for a qualifier, and you need 16 entries to be promoted) we would look at the opponent performance of those 8 opponents you have played! Removing I guess the worst 1 or 2, you'd consider the avg. placement or score in the tour for the remaining 6 or 7 opponents. The side with the best adjustment (that is, those who have made 5 of 8 over the strongest opponents) will "win".
This has been the Swiss tie-breaking method for years in DBgF whether it has been to plan rounds, place a trophy, select winners of a qualifier, etc. (Price money is often split evenly and not by tie-break).
Recently we have started to use opponent rating instead of opponent performance in the tour. So the player who reaches a score (say 5 of 8) and have done so playing stronger opponents than other with 5 or 8 will win.
The advantages of doing this are: - Adjustments can be calculated easily, and throughout the tournament as rounds are played. Adjustments for each opponent are published at tournament start. - Rating is a more precise measure of strength, than say the last 8 games played! - Byes are handled easily and will always give poor adjustment (which is fair if you go 5 of 8 with a bye, you haven't performed as well as those with 5 of 8 all games). - People dropping out of the tournament prematurely will not affect the adjustsments! (This has been a major problem: you beat someone in the first round, then 5 rounds later he leaves the tournament without chance to win anything. Your adjustment for that player will be very low, since he won't win more matches and will end up with a very low score!).
Ratings is then also used to handle out byes giving the first bye in the first round, to the lowest rated player, and subsequently giving byes to the lowest rated player with the least points who haven't been given a bye before. That way, byes are least likely to affect any placements in the top of the field.
I'm at a break from work, the above was written faster than I can handle in English so it might not be very readable. Please feel free to ask if something seems odd!
:-)
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