The interesting part for me now is what penalty Easy has, and why the Effect of DT overweighs it, is it purely based on the AR? or the Mod-Multiplier## PakaChan wrote:

About the open sourced thing: The difficulty calculator wasn't open sourced, it's just the pp part after the difficulty was already calculated. (did i word that right?)

Stuff i could gather:

- There's a length multiplier which scales with max combo. It scales linearly up to 3000 combo, after which it's reverse logarithmic scale.

At 375 combo, the multiplier is 1. At 3000 combo the multiplier is 1.35 after which it scales slowly

- The formula for the miss multiplier is (0.97^no_of_misses)

- The formula for combo multiplier is ( player_max_combo ^ 0.8 / beatmap_max_combo ^ 0.8 )

- The formula for acc multiplier is ( acc ^ 5.5 )

(a HR fc on owen tag4 would be ~1300pp according to this)

- AR gives a 10% bonus for each point above 9 and 2.5% bonus for each point bellow 8

- HD gives 5% bonus for AR10-11 and an additional 7.5% for each point bellow 10

- FL gives 35% bonus and reapplies the combo multiplier again ( a 3000 combo map gets 82% more for FL, a 375 combo map gets 35% more)

- NF gives 10% penalty;