We have created a new rating system for the ladders called the Elo Rating system. This system will replace the True Rank system.
You will still be able to continue using the True Rank system if you are using it now, but all future ladders will not be able to use it.
The Elo Rating system starts each team with a default rating of 1500 points, which will increase as they win and decrease as they lose. The amount of points gained or lost from a game is dependent on the points of the opponent played. For example, if a 2000 point team beats a 1000 point team, very little change will occur to either team's rating. However, if a 2000 point team loses to a 1000 point team, both team's points will change drastically. Teams points will also change more drastically during the first matches that are recorded. This allows teams to reach a stable equilibrium quickly.
The Elo Rating system should be a little more accurate then the True Rank system, and more importantly, easier to understand. If you want to learn more about the math involved, go here:
This new feature is great. I have a few questions though.
1. I wrote a program that uses Canada's Rogers ELO Rating but using my own table for gains/loss and we also started with initial rating of 1600, 1550 and 1500 for our Level 3.0, 2,5 and 2.0 level players and I've entered all our tournament and ladder matches from last year so we have an up to date ratings. Is it possible to manually enter them in Ladder?
2. Can we use this rating system instead of the Registered Level in tournaments? If not, maybe you can incorporate this in future site upgrade where the player has the option to enter a rating (1500, 1550, etc) aside from the Player Level?
I'll wait for the day when we can use this as the official ranking system instead of the Player Level. I'm assuming that for this to happen. we'll have to change the registered player level from the current 2.0, 2.5, 3.0 etc to ratings 1500, 1450, 1400 and so on.
You would have to do it manually at the beginning of the ladder so a player would start the ladder at the points corresponding to their playing level.
So, if a 2.5 level player joins your ladder, you can update his points immediately to 1450 (your choice).
There is no calculations at night on the ladders. That is only your calculated playing level as seen on your profile page on right beneath the player's name in small font. This calculated playing level has zero affect on the ladder.
Daniel / Ted 6 1920 / 1080 2120 / 1280
Deb / Rob 2 1920 / 1080 1720 / 880
Daniel / Deb 6 1484 / 1484 1920 / 1920
Rob / Ted 4 1516 / 1516 1080 / 1080
Rob / Ted 6 1500 / 1500 1516 / 1516
Daniel / Deb 0 1500 / 1500 1484 / 1484
What you'll see is:
- that there was very little points movement (16 points) after the first match - fine
- the second match (which is a repeat of the first match) has a monstrous swing in points (436 points). Why?
- So after the 2nd match, even though everybody was 1-1, there was now a significant differential in points between the players (seems very strange and doesn't reflect reality very much). In addition, the team that lost by a closer score (6-4) now has lower points than the team that got skunked (6-0). Seems unfair.
- We switched up teams for the third match and you'll note that Ted, even though his record is 2-1, has significantly fewer points (440) than Deb, even though Deb is 1-2. Deb, who shares the same 1-2 record as Robert has 840 points more than Rob.
thanks for all your work on this site. I so appreciate it.