Ranked games and ELO

[xescugc]

Aside from being able to play normal games, ranked games should also be a possibility.

The ranking itself will use ELO to calculate the scores.

The main issue is that Games can have up to 6 players so it's just that 1 player won and another loose (or one team won and one team lose).

There are several links I found online on how to calculate ELO for multi players:

• https://gamedev.stackexchange.com/questions/55441/player-ranking-using-elo-with-more-than-two-players
• http://www.tckerrigan.com/Misc/Multiplayer_Elo/
• http://sradack.blogspot.com/2008/06/elo-rating-system-multiple-players.html
• http://web.archive.org/web/20130308190719/http://elo.divergentinformatics.com/

As for GO lib I think https://github.com/kortemy/elo-go is good for it (need to test it but looks good)

Also when looking for a Ranked game the players should be of the same range of ranking.

[xescugc]

For an MVP we could start with having the 1v1 be the only ranked option for now.