SquashLevels
 
 
 
 
More Info

Help title

Help content
 
system
important
Note - rankings are based on results from the last 6 months so shrinking rapidly right now! Changes coming. Watch this space!
cookies_acceptance
important
To give you the best experience we use cookies to remember your settings and personalise your pages and social media. Please click on Accept if you are happy for us to do this. To find out more about our use of cookies please see our cookie policy.

Explaining level changes

Explaining level changes
  • 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!
SquashLevels calculations
 

Mohamed Elshorbagy v Marwan Elshorbagy (Sat 07 Sep 2019)

Match won by Mohamed Elshorbagy. Result: 8-11, 11-5, 11-8, 11-9.

Starting level for Mohamed Elshorbagy: 49,794, level confidence: 61%.
Starting level for Marwan Elshorbagy: 37,449, level confidence: 59%.
Expected winner: Mohamed Elshorbagy as he is 33% better than Marwan Elshorbagy.

Mohamed Elshorbagy won 75% of the games and 55% of the points.
This games result would be expected if he was better by around 25%.
This points result would be expected if he was better by around 22% (PAR scoring).
These are weighted and combined to calculate that Mohamed Elshorbagy played 24% better than Marwan Elshorbagy in this match.

Assuming that any level changes are shared between both players, for this result it looks like Mohamed Elshorbagy actually played at a level of 48,100 and Marwan Elshorbagy at a level of 38,768. Without any damping, both players would need to be adjusted by 3% to match this result.

Factoring in the respective confidence levels which allows players with low confidence in their levels to change more quickly, the adjustment for Mohamed Elshorbagy would be -3% and for Marwan Elshorbagy would be +4%.

After applying damping, the adjustment for Mohamed Elshorbagy becomes -1% and for Marwan Elshorbagy becomes +1%.

Apply match/event weighting which for 'PSA China Open' is 100% leaving the adjustment for Mohamed Elshorbagy as -1% and for Marwan Elshorbagy as +1%.

Increase level confidence due to one more match played. Mohamed Elshorbagy: 76%, Marwan Elshorbagy: 75%. Reduce level confidence based on how unexpected the result is. Mohamed Elshorbagy: 73%, Marwan Elshorbagy: 72%.

Final level for Mohamed Elshorbagy: 49,225, level confidence: 73%.
Final level for Marwan Elshorbagy: 37,916, level confidence: 72%.