Division 3: Thornbury C v Redland Old Doubles 1 (Wed 29 Aug 2012)
Match played between Cliff Hall/Nigel Tovey (home) and Andy Winser/Frank Molony (away).
Match won by Cliff Hall/Nigel Tovey. Result: 15-11,17-14,15-11:3-15,10-15,11-15.
Starting level for
Cliff Hall/Nigel Tovey:
813, level confidence: 10%.
Starting level for
Andy Winser/Frank Molony:
747, level confidence: 67%.
Cliff Hall/Nigel Tovey to win as he is currently playing
9% better than Andy Winser/Frank Molony.
Cliff Hall/Nigel Tovey won all of the games and 57% of the points.
This
games result would be expected if he was better by around 55% or more.
This
points result would be expected if he was better by around 31% (PAR scoring).
These are weighted and combined to calculate that Cliff Hall/Nigel Tovey played
39% better than Andy Winser/Frank Molony in this match.
Assuming that any level changes are shared between both players, for this result it looks like Cliff Hall/Nigel Tovey actually played at a level of
918 and Andy Winser/Frank Molony at a level of
662. Without any damping, both players would need to be adjusted by 13% to match this result.
Factoring in the relative levels of confidence which allows players with low confidence in their levels to change more quickly, the adjustment for Cliff Hall/Nigel Tovey changes to +12% and Andy Winser/Frank Molony changes to -1.7%.
After applying standard match damping, the adjustment for Cliff Hall/Nigel Tovey becomes +7.5% and for Andy Winser/Frank Molony becomes -1.7%.
Apply match/event weighting of 75% for 'Mixed Doubles 2012' so the adjustment for Cliff Hall/Nigel Tovey is +5.7% and for Andy Winser/Frank Molony is -1.2%.
Increase level confidence due to one more match played. Cliff Hall/Nigel Tovey: 32%, Andy Winser/Frank Molony: 82%. Reduce level confidence based on how unexpected the result is. Cliff Hall/Nigel Tovey: 28%, Andy Winser/Frank Molony: 73%.
Final level for Cliff Hall/Nigel Tovey:
859, level confidence: 28%.
Final level for Andy Winser/Frank Molony:
738, level confidence: 73%.
Notes
- This calculation is done in two main parts; first work out the adjustment needed to match the results
and then apply damping. This means that levels should always be 'about right' but the time taken
to get there or the volatility is dependent on the damping.
- A level also has 'level confidence' which drops if players haven't played for a long time or have had
enexpected results. As low confidence levels adjust more quickly than high confidence levels, it allows
these players to find their level more quickly without impacting their opponent's level too much.
- Point scores are used as well as game scores for accuracy - particularly important for 3-0 results -
though we can work with game scores only too, albeit with more damping.
- Mismatched players are allowed for - you don't have to hammer your opponent. See explanation above
if this applies to this match.
- The section on damping is where we still have some options. We have recently made a change to damp
league matches more than tournament matches and box matches even more than that. This gives added
weight to the more important matches.
- There are occasional, very small adjustments made to all players to keep the averages constant which
are not covered here.
- You don't get a bonus just for winning - if you want to go up you have to play better
than expected against your opponent.
- We have spent more than 5 years fine tuning the level calculations based on tens of thousands of match results
and a great deal of feedback from players, team captains and coaches. It's the most usable and accurate
ranking system there is in any sport, let alone squash.
- For a more complete explanation of how levels are calculated (on which this system is based) see the help file
here.
- If you have thoughts/opinions on the above or any feedback on the way levels are calculated or updated,
please contact us.
We welcome all feedback, although we are keen squash players ourselves and would pefer to be on-court than
in front of a screen so please be patient and please do try to see if your question has already been
answered on the help page. We are unable to
answer questions about hard anyone played in their match - we only get to see the results - and if your
level didn't increase as expected please make sure you've looked at the above explanation before
contacting us. If you want to go up the levels, train harder, listen to your coach and win more points.
Or just be incredibly talented!