Planet Kubb:Win index

The Win Index is an attempt to calculate a single value for a given Kubb team that indicates their strength on the pitch.

Some objectives for the win index:
 * Single number that can easily be sorted, does not need to be bound in any range.
 * Teams should not have higher numbers because they've been playing longer. There should be some sliding time period that matches count toward the win index.
 * Suggesting 3 years.
 * The more recent the performance the more it should impact the Win Index.
 * Bracket play in tournaments should weight higher than round robin play.

Proposal 1

 * 1) Create three one year periods: now to 1 year ago (current), 1 year ago to 2 years ago (1 year ago), 2 years ago to 3 years ago (2 years ago). These slide by day.
 * 2) Calculate the match win percent for each year period.
 * 3) Calculate the average of those three win percents weighting the current year times 4, and 1 year ago times 2 with 2 years ago not weighted.

Formula: no prime is current year, prime is 1 year prior, double prime is 2 years prior.

$${ \Bigg( { won \over played } \times 400 \Bigg) + \Bigg( { won\prime \over played\prime } \times 200 \Bigg) + \Bigg( { won\prime\prime \over played\prime\prime } \times 100 \Bigg) \over 7 } $$

Discussion
Differentiating between round-robin and bracket play can definitely be done, will need to double up queries but that should be fine. Not sure what kind of weighting and how the formula would work. Jamie (blog | hello) 03:42, 10 February 2013 (UTC)

Regarding Teams should not have higher numbers because they've been playing longer. I do not believe this is an issue. Teams that play longer have a higher chance of losing matches. It's the teams that played 1 or 2 events and did well that potentially have higher win percentages. Win Index should consider what round the match was lost/won in. Joshfeathers (talk) 15:43, 13 February 2013 (UTC)