I suggest an exponential decay factor, maybe .9. This would avoid these odd reversals. Given my (lack of) record in major events, my gripe has no self-interest component.
Friday, April 30, 2010
Random seeding gripe
In the ACBL seeding system, points for winning or placing in a major event decay arithmetically. So, you get 11-n points for winning the Spingold n years ago. Suppose "Bob" won in 2000 and 2001, and "Zia" won in 2003. As of 2004, Bob gets more points than Zia, 15 to 10, which seems fair. But when we get to 2010, suddenly Zia's win is worth more than Bob's two, 4 to 3. To put it differently, it looks crazy that a win 9 years ago is twice as good as a win 10 years ago, while wins initially decay only mildly, 10% a year.