I am going to run/administer a table tennis ladder in the department and have been reading a bit on different ladder systems. I have read the suggestions on a relevant question but, with all due respect, I can't say I am happy with either answer. I feel like swapping is too extreme where as ELO would be too convoluted for this level, not to mention too much of a pain for me to keep tabs.
I came across ladder rules from a casual table tennis club and decided to modify them a bit. Came up with the following concept, but I am not sure if it is fair. Any help is warmly welcome at this point.
- All players start with 100 points (due to no prior ranking of players)
- Matches are played as challenges, thus can occur asynch
There are three possible cases for the matches with regards to winner (W) and loser (L)
If (W) has 50% or more points than (L) --> (W) gets 20p and (L) gets 10p. Example scenario: Player A has 200p and wins over Player B who has 100p. New points would be 220p for A and 110 for B.
If (W) has 50% or less points than (L) --> (W) gets delta/2 points, whereas (L) loses delta/2 points [delta = point diff between players prior to the match] Example scenario: Player A has 100p and wins over Player B who has 200p. New points would be 150p for A and 150 for B.
If (W) and (L) are within 50% in points to one another --> (W) gets 30p and (L) gets 10p. Example scenario1: Player A has 100p and wins over Player B who has 80p. New points would be 130p for A and 90 for B. Example scenario2: Player B wins over Player A (with the same points as Ex1), then new points would be 110p for A and 110p for B.
The idea here is to give incitement for playing more games, so losing to a better player is not all that bad. I have made up the numbers a bit ad-hoc though so I am not sure if it would be fair in the long run.
Edit1: example scenarios given for three cases.