🚨League MMR System EXPOSED - LP Gains/Losses in S13

Similar to losing at 0 LP, winning at 99 LP can result in 'overflow LP' after promotion, leading to better gains and smaller losses. Win and loss streaks significantly impact MMR, particularly for newer accounts. Riot tends to adjust the MMR of newer accounts more aggressively to place them at their correct ELO, as opposed to highly seasoned accounts.

Mason explains that a significant gap in LP gains and losses (e.g., +19/-27 LP) indicates that a player's MMR has fallen considerably. This can happen due to continuous losses, especially when at 0 LP, as the system still deductions MMR even if LP isn't visually lost until demotion. This brings a player's MMR closer to a lower division, thus leading to imbalanced LP changes.

For brand new accounts, the highest MMR from normals or ARAM will determine the initial ranked placement. Mason reveals that by playing and winning a small number of normal games (around 10-20 with an 80% win rate), players can significantly boost their starting ranked MMR. Playing with a high-MMR duo in normals can also inflate a new account's MMR, leading to higher initial LP gains in ranked.

The discussion shifts to the impact of a hard ladder reset and the introduction of new ranks like Emerald. A hard reset could be beneficial in the long term, though challenging initially. The removal of divisional promos and the addition of Emerald are seen as Riot's attempts to manage LP inflation and the increasing number of high ELO players, aiming to improve ladder health.

Duoing changes the game environment. The system attempts to match duos against other duos. More importantly, when duoing, players are placed in games with an MMR ceiling 100-200 LP higher than their solo MMR. While this can lead to higher LP gains per win, the individual's underlying MMR doesn't increase at the same accelerated rate. This discrepancy can lead to reduced LP gains once a player returns to solo queue.

Riot has acknowledged that blue side historically has a higher win rate. To balance this, the system places lower MMR players on blue side. Consequently, players on blue side might gain 1-2 more LP for a win, while those on red side might lose 1-2 more LP for a loss, as they are considered to be playing against technically weaker opponents.