*Elo ranking NSFL teams

[IthicaHawk]

Not sure whether I would adjust the k factor for playoffs or not (again, this is done in the soccer equivalent), and it's probably best to experiment with that.

I have the ability to do this, I have experimented with making the K factor 40 for the playoff games (double regular season) to give more weight to those games in particular.

Same goes for adjusting k factor based on rating (as is done by the USCF, so lower rated players don't get the same rating boost by beating a peer as a grandmaster might).

This is interesting but I think maybe it would work better if there were a larger number of teams and more games. As it happens, 13 weeks games and 10 (now 12) teams isn't a huge number so I think it would disproportionally effect lower ranked teams. Additionally, having it _not_ scale as you suggest has the effect of slowing gain/loss of Elo for top ranked teams and bottom ranked teams. This prevents it getting out of control. In some versions of the sheet as I worked on the factors you had over 1000+ Elo difference between top and bottom.

Would probably be interesting to track this all the way back to season one, with expansion teams being added with a base rating of 1500 as and when they were created.

There's nothing preventing this except the manual data entry taking time. For S22 both new teams have joined with 1500.

If you wanna look at that as a larger project, hit me up on the dev/wiki discord server and we can plot something out.

I don't think I'm on that one so just drop me a PM if you have some thoughts