All-Round Rankings (KinchRanks)

[not_kevin]

Not sure where best to put this, but I've been idly thinking about the "most balanced" cuber for a while, based on some comment that someone made about their KinchRanks standard deviation (alas, I can't seem to find it now T__T). But now that I wanted to calculate this, I'm having trouble justifying exactly what it should look like.

So, the naive approach is to simply take the standard deviation of the per-event values - but then cubers who only do a couple events and are somewhat slow are greatly advantaged here. So I thought maybe using a metric like "standard deviation of all non-0 values", but it still greatly rewards slower cubers over faster ones (which isn't bad in and of itself, I guess, but I'd prefer rewarding doing more events more). I thought about standard deviation / overall KinchRank, which would help that, but there's the issue that competitors who do few events are rewarded. I also thought of things like total range of event KinchRanks over overall Kinchrank, but it still runs into similar problems, and also isolates out the best and worst (eg, a competitor who has event KRs of 40 for all but two events, which are at 0 and 100, will have a score of 100; meanwhile, a competitor who evenly has KRs ranging from 0 to 80 would be "more well rounded" by this metric).

Anyone have any thoughts for a good statistic for measuring both well-roundedness and speed?

 

[not_kevin]

Another KinchRanks-related thought, based on measuring the relative strengths of each country: the country rank on Daniel's site (https://sites.google.com/site/danielsheppardcuber/home/KinchRanksCountries) could suggest that Poland produces the best all-round cubers, but this ends up being rather false - instead, it produces the best _specialized_ cubers (what, with Marcin Kowalczyk contributing two 100% values despite having a personal KinchRank of 24.52 [coming in a 878th]). To answer the question of which region produces the best all-round cubers, perhaps we could take the average KinchRank of some top section of each country (either a flat number, like the top 10, or a percentage, like the top 1%), and compare those? Just curious what countries would stand on top with such a metric.

 

[Isaac Lai]

Another KinchRanks-related thought, based on measuring the relative strengths of each country: the country rank on Daniel's site (https://sites.google.com/site/danielsheppardcuber/home/KinchRanksCountries) could suggest that Poland produces the best all-round cubers, but this ends up being rather false - instead, it produces the best _specialized_ cubers (what, with Marcin Kowalczyk contributing two 100% values despite having a personal KinchRank of 24.52 [coming in a 878th]). To answer the question of which region produces the best all-round cubers, perhaps we could take the average KinchRank of some top section of each country (either a flat number, like the top 10, or a percentage, like the top 1%), and compare those? Just curious what countries would stand on top with such a metric.

The only reason why Poland is so good and other countries are dragged down is because of multi-BLD.

 

[not_kevin]

The only reason why Poland is so good and other countries are dragged down is because of multi-BLD.

Not the only reason - they actually are fairly good at all events (although I definitely agree that mbld is by far the largest factor). Consider that their worst event KinchRank is 75.61 (in 2x2), for example. But more telling towards my point, their OH, Feet, Clock, Skewb, 6x6, 7x7, 3bf, _and_ 5bf are all above 90 (along with mbld, of course), but of those 8 events, 7 different people hold titles (the only repeat being 6x6 and 7x7 by Michał Halczuk). This suggests that the region doesn't actually have very many true all-rounders (or, maybe, no all-rounders can hold a NR compared to the specialists in the region).

As an easy comparison, see that Australia is basically dominated by Feliks, with Jay taking most of the other events except some BLD events (which Zane has) and Clock (which Tomas Macadam has).

 

[kinch2002]

http://www.kinch2002.com/kinchranks/
Updated for all those September comps you went to and did good stuff at

 

[yoinneroid]

http://www.kinch2002.com/kinchranks/
Updated for all those September comps you went to and did good stuff at

I don't do enough good stuff to say at top 5

 

[kinch2002]

Just made a load of improvements to the pages. You can now see all the columns All the names and countries link to the relevant WCA profiles as well.

 

[Stefan]

KINCHRANKS WEBSITE

Can you make that link go directly to the KinchRanks page? The page it does point to only has them hidden in a sub-menu.

 

[kinch2002]

Can you make that link go directly to the KinchRanks page? The page it does point to only has them hidden in a sub-menu.

Thanks for pointing that out, edited it now

 

[Hssandwich]

Were there ever single kinchranks?

 

[JustinTimeCuber]

Were there ever single kinchranks?

I think it's supposed to be just an overall thing so no

 

[NevinsCPH]

Not sure if this is in google doc function. Forgive me for being lazy to look it up. I think it will be easier to view the KinchRanks if you can freeze the top row and the name column?

 

[Theo Leinad]

Bump!!
Now that means will be recognized for big blinds and there's kinda a new structure, will these be taken into account?
If so, is the code prepared for this change?

 

[CarterK]

Bump!!
Now that means will be recognized for big blinds and there's kinda a new structure, will these be taken into account?
If so, is the code prepared for this change?

Code probably isn't prepared, but it'll probably act like it does for fmc and 3bld where it's whatever is better between your single and mean.

 

[highnickk]

I really want to see my sum of ranks or Kinchrank, but all the tools are either just the top 100/1000, or there are thousands of pages.

 

[Spacey10]

I really want to see my sum of ranks or Kinchrank, but all the tools are either just the top 100/1000, or there are thousands of pages.

What the heck is that?

 

[CrispyCubing]

I really want to see my sum of ranks or Kinchrank, but all the tools are either just the top 100/1000, or there are thousands of pages.

I’ve wondered about this too but I don’t know where you can find individual kinchrank by searching.

What the heck is that?

Kinchrank is a way to rank overall skill. I’m assuming this is the website @nicholas the cuber is referencing:https://wcadb.net/kinchranks.php

This is an explanation on how the system works.

Spoiler: Kinchrank

All-Round Rankings (KinchRanks)

I devised KinchRanks in May 2015 as a new system to rank all-round ability. Read all about it in the post below, or go to the website where I'm hosting the info and rankings, https://wca.cuber.pro/kinch/persons Homepage content:

www.speedsolving.com

 

[Mike Hughey]

I really want to see my sum of ranks or Kinchrank, but all the tools are either just the top 100/1000, or there are thousands of pages.

Found you in the world rankings. It wasn't easy.
(it's here for now, but of course it will move as other competitions are held)
Rank is tied for 58580, score is 2.36.

Kinch Rank - Persons

Nicholas Trofimov 2.36 21.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 18.66 0.00 0.00 0.00 0.00

The way I did it was to first calculate your kinch rank, then use the thousands of pages and binary search for that value. It didn't really take that long, but it's not exactly easy.

 

[Jorian Meeuse]

Recently, I noticed a peculiarity in kinch score calculation, and I was wondering if it was this way on purpose or not. For MBLD, the time is incorporated into your score by adding the proportion of the hour you have left to the number of points. However, when attempting fewer than 6 cubes, the time limit is no longer an hour. Shouldn't the 'proportion of the hour left' be replaced by 'proportion of time limit left', to avoid guaranteed extra points without extra effort?

Example:
The current MBLD WR is 59.03694... (This is unambiguous, since the time limit was one hour)
Tymon's MBLD PR is 2/3 28:39. This means his score would currently be 100(1+(21/60+31)/60)/59.03694... = 2.58
If, instead, we take the proportion of his time limit (here 30 minutes) left, we get a score of 100(1+(21/60+1)/30)/59.03694... = 1.77
This amounts to a reduction in his total score of (2.58-1.77)/17 = 0.05 (although I'm not too sure how rounding is handled: would his MBLD score be considered precisely 2.58, or would the actual 2.57889.... be used to determine the average kinch score?)

This doesn't seem too significant, but Tymon is currently ranked 25th, and would be ranked 27th otherwise (yes, current 26th and 27th place had 1 hour time limits). Now, obviously I'm not bringing this up because I want to push Tymon down in the rankings or anything, but I do think it's more fair to calculate in this way. You could see it as me wanting to give Manuel Gutman and Jakob Gunnarsson the higher ranking they deserve, rather than to give Tymon the lower ranking.

Which brings me back to my original question, is there a reason that this isn't used, or was it never really considered?

 

[speedcuber15]

What is Overall