Ranked in League of Legends places players on a ladder of tiers. From lowest to highest these are Iron, Bronze, Silver, Gold, Platinum, Emerald, Diamond, Master, Grandmaster and Challenger. Each of the tiers from Iron to Diamond is split into four divisions, IV (lowest) to I. The summoner search shows a player’s current tier, division and LP for both Solo/Duo and Flex queues.
League points (LP)
Wins earn LP and losses remove it. Reaching 100 LP in a division promotes you to the next one. The amount gained or lost per game varies: it is tied to Riot’s hidden matchmaking rating, which StatChecked does not display because Riot does not make it public. When a player consistently gains more LP per win than they lose per loss, the system believes they belong higher.
The apex tiers
Master, Grandmaster and Challenger have no divisions. Players are ranked purely by LP. Grandmaster and Challenger are capped at a fixed number of places per region, with thresholds updated daily, so a player can drop out of Challenger without losing a game if others overtake them. The leaderboards page lists these ladders in LP order.
Solo/Duo and Flex
Solo/Duo allows queuing alone or with one friend and is the main competitive ladder. Flex allows premade groups of any size except four, and it has a separate rank. Most tier lists, including StatChecked’s, are built from Solo/Duo games.
Why the LP graph fills in over time
Riot’s API gives a player’s current rank, not a history. StatChecked records a snapshot whenever a profile is viewed and the rank has changed, and draws those snapshots as the LP graph. Profiles that are looked up often therefore have a detailed history, and a new profile starts with a single point.