These are freqeuently asked questions for the Squash Levels site. Please look through these before contacting us as there is a good chance your question is already covered. If not, then please get in touch and we can add your question to this list. Click on the question to reveal the answer.
We often get asked what levels are so here's a FAQ specifically focused on that. For more generic questions on the system as a whole please refer to our generic FAQ. For more detail on the level algorithm itself and insight into the rocket science of automated calibration please refer to our calibration FAQ. If you still have questions on levels then do please let us know and we can add them.
The ultimate aim of SquashLevels is to assess the level at which every player on the system is playing after every match they play and give them a number - their level - to represent that.
The level is mathematically comparative between players such that if you are playing twice as well as your opponent then you will have twice the level and this applies all the way from a beginner's first competitive matches to the top pros. This should apply wherever you are, however good you are, whoever you played and whenever you played!
This allows us to plot graphs, compare players, predict results, set goals and even compare players from different eras! Although it's all comparative, it's fixed to a specific level at a specific time so it can actually be treated as an absolute figure. That's really important so that when a player knows what level they are, they know what that means. These are the sorts of levels we find. Numbers very approximate as clubs, counties etc. vary considerably!
With the vageries of human behaviour, millions of matches over decades of time, it's a complex task!
Levels are calculated for every player after every match and are based on:
We can work with game scores only, making assumptions around the average 3-0 result (based on our analysis of real 3-0 match results) but we can only use averages so it takes a lot more results for the levels to become accurate. Not all 3-0 results are the same, obviously.
They're really very different but if you order players by their level you will get a ranking and you can compare that with the latest tournament based rankings and usually see the two lists looking a bit the same but not the same. This can cause confusion and lead to the question; 'Why do we have two different rankings?!' It's a fair question!
Level based rankings - which is what SquashLevels generates - are based on a player's current playing level and (as per the section above) that's entirely based on their actual results against their actual opponents. It doesn't matter who the opponent is (it's just their level that counts) or what tournament it is and not which round they are playing in.
Tournament based rankings are based on points accumulated from progressing through the rounds of tournaments over a number of tournaments. Each round is worth more points (usually double) and the whole event is usually scaled so that the more prestigious events (with the better players) are worth a lot more points. Usually, the rankings are based on a points based algorithm such as the average of your best 10 tournaments over the last 12 months. In this case progression through tournaments is everything - in fact not progressing is often worth nothing!
It's interesting to compare the two methods:
So in summary:
This means you have a provisional level which is simply that you have 5 or less results on the system. Your level should be reasonably close after 5 matches but another important point is that while your level is provisional, the system will adjust your level after your matches but not your opponent (unless it's a county league or tournament match). This allows you to get some games in against a few players while your level is settling without impacting their level.
Your current SquashLevels level is a calculated assessment of your current playing level which, by definition, can fluctuate quite a bit. That's what makes it so interesting! However, for official rankings pages, we want a longer-term view of your level so we apply 'extra damping'. For this, we use the four match moving average level (see below) which smooths out the fluctuations and gives a more considered value for your playing level.
Your four match moving average is calculated for your full playing history so even looking back at previous ranking periods, we can still apply this extra damping.
The level changes are damped quite a bit but they do still go up and down by a few percent each match based on your results. If you're going to be using them for tournament seedings it's a good idea to damp them even more so they are more stable. The four match moving average level for a match takes the level from each match and averages it with the levels from the three previous matches to provide a heavily damped level for that point in time.
For the rankings, this four match average applies to the 4 most recent matches.
It's important to remember that the level calculated by SquashLevels is an assessment of how well you're playing at the moment and that is based on your results and the level of the person you played. If you're better than your opponent then you're expected to win so the big question is not 'did you win?' but how did your result compare with what was expected? If you didn't do as well then your level will go down - at least a little.
It's similar to asking your teammates on the balcony how well you played. You may well have won the game but they will know if you made a bit of a meal of it...
This is important as it rewards effort. You can nearly always get a level reward for putting the effort in and doing better than expected. This is perfect for juniors as there's always something to go for whoever you're up against. You might be expected to lose but you can still improve your level and that's something to go for.
There is some leeway for players that have quite different levels because we don't expect a much better player to hammer their lowly opponent just to keep their ranking up. In this case, the system assumes there's a range that the better player might play at and only if the result falls outside the range will either player's level be changed.
We do receive suggestions that winners should be rewarded for winning and they certainly shouldn't take a drop in level which is similar to the classic tournament systems. In this case players are awarded points for every round won, usually doubling each round, and the guys that win the tournaments get vast numbers of points. That all sounds fine but if you don't play many tournaments or you keep getting seeded against better players and get knocked out too early then your points tally isn't going to be representative and you'll be stuck way down the rankings - and that can be hard to get out of as it tends to self-perpetuate given the way seedings are done. This is a very common problem with tournament based rankings.
And what if you don't play tournaments? How would you treat a win in the boxes compared to a win in the league for instance? What if you always have easy league games? Systems that give a win bonus cause the better players to want to play further down the team order to seal that bonus. That's not the kind of behaviour we want to promote.
Using levels and estimating your actual playing level reasonably accurately based on both the games score and the points score is what makes the system accurate, inclusive and relatively independent of the match you are playing and where you are seeded in the team. If we were to give bonuses for winning it would skew the levels and the rankings would quickly become inaccurate and, worse still, change player behaviour out in the leagues.
Another problem is that if you increase the level of one player without reducing the level of their opponent then the average level of that match - and therefore the entire system - goes up over time which means you can't compare a player's level over time. This already happens to some extent due to the behavioural modelling and there are other factors taken into account and so the average has to be pulled back somehow, very gradually, over time. It's a complex part of the algorithm but it's essential that there isn't net gain or net loss across the system.
We take the accuracy of SquashLevels very seriously so always want to know about cases like this. There are a few common reasons:
If you feel that a player is in the wrong order (by, say more than 10% from a relative level point of view) then please get in touch and we'll take a look. The system is no good if it's not accurate and that's our holy grail!
The level is recalculated for the match just updated but if that's not the most recent match then your latest level will not be changed. Level history is re-calculated every night so just wait until the morning and it will all be sorted.
Sometimes you can see that your level has gone up by, say 5%, but when you look at your actual levels on your history page it hasn't. It may even have gone down!
The most likely cause of this inconsistency is that someone may have updated the results (maybe there were corrections) since the nightly processing was run so now one or two of the results aren't consistent. Level history is re-calculated every night so just wait until the morning and it will all be sorted.
If you click on the level change text in your results history, you will be taken to a page that explains how that level change was calculated. It is the actual level change code that runs in this page, except it's in 'verbose' mode so you can see what's happening (which is why it's a little cryptic). If you still can't see what happened please get in touch and we'll explain it.
This is done automatically by the system and is based on your first few results. As long as someone somewhere in your league has a level, the system can work out everyone else's level based on the chain of results - even if that means working backwards in time. The first pass at this gives an approximate set of levels but this is fine tuned every night so after a week or so of your first results going in, your initial level will be accurate and stable.
Your initial level can also be adjusted by the inter-league calibration process that runs every night as that's how whole leagues are adjusted. These adjustments are normally very small but can be significant over time. Once the leagues are calibrated, they go stable.
We do need two or three representative results within a period of a couple of months to get you going so it can be less accurate if, say, you have one result and then nothing for a few years after that. In these cases it's probably worth a little manual adjustment. If your initial level looks wrong, please get in touch and we can take a look.
SquashLevels is a global system, receiving results from many systems around the world and continually calibrating the playing levels of the many clubs, regions and countries involved. Mostly, new results come in for the last few days but sometimes we will import historic data or even just a tournament from a week or so ago. This sort of thing will affect the levels of the players involved and also their opponents and then their opponent's opponents and this can affect the levels of players who haven't even played recently.
Mostly the changes are fairly small (<1%) but, if your recent history is directly affected by these historic imports then you might see more of a change.
As well as having a level, you have a level confidence. This is a figure used to express (as a percentage) how much confidence the system has in your level - 10% for new players, 70% or more for established players. It is adjusted as follows:
The effect it has is that if your level confidence is lower than that of your opponent then your level will move more quickly than theirs. This allows the system to adjust the levels of the players who's level might be inaccurate more quickly with limited impact on their opponents. It also allows fast moving players to move fast!
SportyHQ is a comprehensive tournament, league and membership management system and has its own ranking system based on 'SportyHQ points'. For those familiar with SportyHQ points and wondering how they compare with SquashLevels here's a summary of the main differences:
We ran a comparison between SportyHQ points and SquashLevels level (based on one SportyHQ region) to create a mapping between the two systems though bear in mind this is approximate as SportyHQ doesn't perform calibration, the absolute values may vary from region to region.
|SportyHQ points||SquashLevels level||Standard|
Yes! As we've rolled out SquashLevels in Australia we've had more people look at and check out their rankings and had some feedback that they're not quite as expected! We've investigated this and found two main reasons:
We won't be asking clubs or states to reset or re-enter any starting levels. We have developed a mapping between SportyHQ points and SquashLevels level and re-used the rankings as defined by the clubs and states from four years ago for SquashLevels to use as a starting point. SquashLevels has then used its own algorithm from there to get to your current level.
We do have a cunning tool for determining what a player's level should really be irrespective of algorithm, points value or level. We are able to compare any two players based on their results with their opponents, and the results of their opponents against their respective opponents and so on until a linkage is found between the two players. This might sound tenous but there are often hundreds of such linkages between two players in the same league, pennant or tournament and with a bit of good old-fashioned weighted averaging we can get a really good feel for the difference between two players. If you think someone is still in the wrong place in the rankings we can run a player compare and see where they should really be.
Please see the SportyHQ compare FAQ above to learn more about the mapping between SportyHQ points and SquashLevels level.