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So, today I got autofilled into someone else's primary role. Should that happen?

Nameless Voice·11/26/2016, 12:00:40 AM·240 votes·6,858 views

Got in the queue today and got immediately autofilled as support - which is fine, I don't mind playing support. But, then one of my teammates says that they queued as support/fill - and were placed top.

That seems like a bug in the algorithm. Surely if someone is getting autofilled, they should be placed into a role no one else wants - not given a role that someone else had asked for? e.g. in this case, I should have been autofilled into top rather than support.

Unless I'm missing something?

116 Comments

Kaisa is Hot11/26/2016, 12:31:31 AM19 votes

[{quoted}](name=Nameless Voice,realm=EUW,application-id=3ErqAdtq,discussion-id=eRG2niy8,comment-id=,timestamp=2016-11-26T00:00:40.922+0000)

Got in the queue today and got immediately autofilled as support - which is fine, I don't mind playing support. But, then one of my teammates says that they queued as support/fill - and were placed top.

That seems like a bug in the algorithm. Surely if someone is getting autofilled, they should be placed into a role no one else wants - not given a role that someone else had asked for? e.g. in this case, I should have been autofilled into top rather than support.

Unless I'm missing something?

What I consider a bug is that I got autofilled into support after only waiting 1:43 in queue, I mean that was the end result in the timer, but I did have 2 dodged lobbies where I had my preferred role, why would it auto fill me after SOMEONE else dodged.

aspects111/26/2016, 8:48:25 AM7 votes

spaghetti code op

Requiemsfire11/26/2016, 11:36:47 AM5 votes

My friend queued as support/mid and wound auto-filled as toplane. My response was like"HOW THE HECK?!"

There's no reason for someone who is fill or auto filled to get someone else's primary especially if its not their secondary or primary.

Thuban11/26/2016, 7:04:59 AM5 votes

[deleted]

6Sfool11/26/2016, 3:03:42 PM3 votes

Yes that should happen. Primary means only one person can have it. Then 2 people get their secondary picks and everyone else gets autofilled. Sheesh, you must not know anything.

bbb11/26/2016, 11:37:26 AM2 votes

Riot decides that "fill" singlehandedly means support.

Lao Fu the Tiger11/27/2016, 1:23:25 PM2 votes

Nerdy simple answer is that no, it's not a bug, it's working as programmed, but it may not be exactly optimal from a human perspective.

I'm not sure exactly how the queue searches for players, but assuming it already has basically empty slots filling two teams, here's how I imagine the situation could result, assuming the other team is already filled up.

  1. Assuming the algorithm simply locks in players as they come in, somebody else originally got queued as top.
  2. You queued with autofill and it placed you in as support.
  3. The person who was originally queued as top lane left the queue.
  4. The person who chose fill joined the queue after the algorithm placed you, and because whoever was top left, it placed him there instead.

The result is you in support through autofill and him in top through his fill position.

Implementing an algorithm that can dynamically rearrange teams while in place is incredibly hard to do, and has the potential to cause problems. The age-old adage that a machine with more moving parts is more likely to break definitely applies; it's overall better to be switched every once in a while and negotiate with teammates for the position than to trust an algorithm to rearrange teams on the fly.