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Base Score

Overall score calculation is based on Malody Score System. Malody’s scoring system is cumulative. Each correctly hit note awards a certain score, and the total score is the sum of all individual note scores. Specifically, the score for a single note consists of a Base Score , a Combo Bonus Multiplier and a Mod multiplier: 
Total Score = Base Score * (1 + Combo Bonus Multiplier) * Mod multiplier
The Combo Bonus Multiplier starts at 1. The judgement received will change it (see table below), but it will not exceed 1 or drop below 0. When calculating the score for a note, the Combo Bonus Multiplier is updated first, then the score is calculated.
JudgementBase ScoreImpact on Combo Bonus
PBest / Best1000+0.01
Cool750-0.02
Good400-0.08
Bad0-0.16
Miss0-0.32

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Accuracy

Accuracy is calculated based on the statistics of different judgments during the current play. The maximum value is 101%, with the extra 1% coming from PBest. The calculation formula is as follows: 
Accuracy = ((Best + PBest * 1.01 + Cool * 0.75 + Good * 0.4) / Total Notes) * 100%
Where:
  • Total Notes = Best + PBest + Cool + Good + Bad + Miss
JudgementAccuracy Contribution
PBest101%
Best100%
Cool75%
Good40%
Bad0%
Miss0%

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Mod Multipliers

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Rank Mods

TypeModMultiplier / Formula
SpeedSpeed Up (Speed > 1)1 + (Speed - 1.0) * 0.24
Ex: 1.5x = 1.12x
Slow Down (Speed < 1)Factor = Speed
Ex: 0.75x = 0.75x
JudgementEasy0.78x
Normal1.0x
Hard1.2x
SpecialSlide Only1.06x

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Unrank Mods

ModMultiplierDescription
Relax Judge0.5xEasier judgement
CTB Judge1.24xOSU!CTB style judgement
Dodge The Best0.1xDodge mode. Difficulty factor effect is reversed (larger catcher = higher multiplier)
Custom Judge0.4x - 4.0xDepends on Difficulty Factor