Teamfight Tactics Ranked: A Detailed Look at the Ranked System

Teamfight Tactics Ranked ladder can be difficult to jump into if you aren't familiar with how Ranked matchmaking works in League of Legends. Even if you are familiar with the game, you might have a lot of questions, like "How do I gain LP if only one player wins in TFT?" We're here to answer those questions and more.
Teamfight Tactics Ranked System Breakdown
For starters, Riot Games put out a detailed blog post on the Ranked system shortly after TFT's launch — we'll mostly be drawing information from there. Patch 9.16 also made a few minor adjustments to the ranked system (you can see our breakdown of the patch here).
When you queue up for a ranked game, you're looking to earn LP. If you finish in the top four players in a game, you earn LP; if you finish below that, you lose LP. Getting 100+ LP gives you an instant promotion, while dropping below zero LP causes you to be demoted.
Your overall rank is determined by your division and a number (IV - I), much like in League of Legends. In order, the divisions are: Iron, Bronze, Silver, Gold, Platinum, Diamond, Masters, Grand Masters, Challenger. Higher divisions outrank lower ones, while lower numbers indicate that you're closer to ranking up. Diamond IV is a higher rank than Platinum II, but Gold I is better than Gold III.
Let's look at some examples. Let's say you have 80 LP and you're Bronze IV. You win a game and get +25 LP, so now you should be at 5 LP in Bronze III. If you have 90 LP in Silver I and you get +13 LP, you would be Gold IV with 3 LP.
Your rank determines who you get matched up with in your games. You can still play Ranked with friends, but they have to be within a specific range to party up. Here's Riot's visual guide for parties:
Cover Image Courtesy of Riot Games