This is turning into another good thread – so thanks for everyone’s contribution so far. I think it’s important to remind everyone what Wyld's challenge actually is (and I also hope Wyld posts to acknowledge that his challenge still stands)
Wyld wrote:
I will go further and say that I believe that my formula is the most accurate formula for predicting a player's FPL score next gameweek ever posted on FISO
So this has to focus on individual GWs and being accurate to that GW - not how accurate you are across a larger period - although a larger period, say 10GW allows us time to see whether the formula is lucky or accurate, nor whether you are good at comparing points for 2 different players etc.
Relegated_By_Xmas wrote:
For example, forwards tend to score 2 points a week, unless they score or assist. Unless he's likely to score more than once every other game, your best guess is 2. For example, Andy Caroll has scores of 17,2,8,2,2,5, for an average of exactly six. If you guessed 6 every week, your difference would be 26; if you guessed 2 every week, your difference would be 24. So 2 is slightly better, in spite of the clear fact that 2 was an atrocious guess on average and 6 was bang on. In fact, guessing anywhere between 2 and 5 every week gives exactly the same score after 6 weeks.
I agree with this too and that's why I want to be able to come up with a marking system for individual GWs
Sutter Kane wrote:
This is exactly why I said is 10GWs enough: Over time we can see which formula (if any) is any good by the average ppg off target as a %; so the smaller your average % the better you are doing?
So if you predict 2, 4, 6 and it's 3, 6, 6 you are 50% away, 50% away, 0% away, leaving you 33.3% away overall, is that right??
Personally, I think 10 GWs should be enough to fathom whether a prediction formula is accurate or not. Not a fan of your scoring method however. Firstly, taking your example above, if 2nd person’s prediction is 4,8,6 then this means both formulas are similar, which they’re not as one is over predicting. Secondly, if person predicts 3,6,12 does that make them 0%away, 0% away, 100% leaving you 33% away overall? The second formula is more accurate but is deemed the same as first.
hancockjr wrote:
I'm unlikely to enter, but would suggest that players declare whether their entries are "model" "model plus judgement" or pure judgement. People should be able to enter more than one of these - for instance enter their model "as is" plus another with judgement added.
Disappointed to read you won’t enter but I had already made the decision that people had to say whether they were using 100% formula, formula with ability to use outside knowledge or pure judgement. As for entering multi teams – I think I’m going to be busy enough so one team per person but people can publish their own additional predictions ahead of time if they wish
cincirollers wrote:
Let me try it this way. I don't think anyone can predict with any (consistant) accuracy the points a player is likely to get for any single given gameweek. There's just too much variability. But it would still be useful to know whether player A is going to score more points than player B (in any given gameweek), and I think this approach may have a better chance of success. This isn't exactly what Wyld's formula is designed to do, but might prove useful even if it never gets anywhere near the actual points a player scores in a single predicted game week..
I agree with this but I need to be fair to Wyld’s challenge and this was predicting a player’s FPL score next GW.
But how to mark this fairly seems to be the area where I’m almost thinking someone needs to create another formula for.....
So, what do people think of this? The accuracy is done via points with a person trying to score as close to 0 as possible. As has already been shown, it is more likely that players will score relatively low – 6 and below, so predicting under the actual score has a higher penalty than predicting above the actual score. At the end of a GW the totals are added and we have a ranking of how well people did. If you come 1st, you score 1 point, 2nd = 2 pts etc. Person at end of 10 GWs with lowest overall ranking score shows they were best at predicting each week.
In the meantime, please see below my individual GW scoring and let me know if you think this is a fair way of penalising or scoring people – if not, any other suggestions please.