osu-lazer

Reduce strain influence a bit more (#36813 )

Changes snap aim scaling to d/t^1.65 and speedflow scaling to d/t^1.9
(roughly). This is as much as we can nudge scaling towards d/t without
breaking everything

StanR · 2026-03-04 17:50:49 +00:00

020e6fa1b2

Aim strain influence reduction (#36792 )

Currently, live aim evaluation prioritizes high bpms with lower
distances over low bpms with higher distances, something you may have
heard colloquially called "d/t^2" in here. This creates an inherent DT
advantage / NM & HR disadvantage in the average aim case.

This change makes it so the evaluation is nudged closer to the ideal
distance/time aim evaluation. In practice, higher spacing (distance)
and/or slower jumps should generally see a buff, lower spacing
(distance) and/or faster jumps should generally see a nerf. This
includes some 3-mod scores as HR spacing is underweighted regardless of
bpm.

It also affects streams the same way, where faster high bpm low spacing
streams (speedflow) are nerfed and high spacing low bpm streams are
buffed.

As a disclaimer: this isn't a complete fix, it is moreso a step in the
right direction (hence, a Nudge, per se) towards the ideal d/t world.
This also doesn't change anything angle-related so high-spacing farm
maps will gain pp - this will be addressed separately after this change.


https://pp.huismetbenen.nl/rankings/players/reduce-strain-influence

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>

StanR · 2026-03-02 23:38:32 +00:00

b1227e1f12

Fix combined slider velocity calculation (#36773 )

This changes how the current/previous velocity is being calculated in
Aim. Currently it's being calculated as an addition of 2 velocities
together which isn't really correct, instead here velocity is being
calculated as a (combined distances) / (combined times). On practice
this buffs underweighted slider maps while overweighted ones stay about
the same

https://pp.huismetbenen.nl/rankings/players/use-proper-slider-velocity

StanR · 2026-03-02 23:14:31 +00:00

f241d9c84e

Use full hitwindow in taiko Rhythm skill (#36671 )

StanR · 2026-02-26 19:13:21 +00:00

2d6fa65262

Q1 2026 osu! Balancing pass (#36734 )

Nerf mid-level snap aim, buff raw tapping, buff flow slightly, buff
highbpm aim slightly

https://pp.huismetbenen.nl/rankings/players/q1-2026-balancing

StanR · 2026-02-22 15:48:58 +00:00

a14e87fdd9

Fix Aim's skillMultiplierTotal being applied incorrectly (#36699 )

Fortunately its 1.0 so it didn't break anything

Co-authored-by: James Wilson <tsunyoku@gmail.com>

StanR · 2026-02-18 18:37:36 +00:00

716cd8d9ab

Adjust RX-related multipliers (#36697 )

Mostly just keeping RX sane. I don't think we want to go too deep into
the balancing here

StanR · 2026-02-18 18:12:12 +00:00

de507899e2

Adjust wide angle bonus to be closer to SpeedAim distance scaling (#36670 )

StanR · 2026-02-15 00:40:19 +00:00

62fdd421ce

Change accuracy pp to be uncapped (#36669 )

This also transfers some of the accuracy pp length bonus to aim which
makes it at least somewhat difficulty-aware. Value changes are very mild
(10pp at most for most players)

<img width="1613" height="575" alt="image"
src="https://github.com/user-attachments/assets/f2d27230-6771-4c4b-932c-33a8d804002d"
/>

StanR · 2026-02-14 23:59:15 +00:00

a166d0046d

Refactor DifficultyHitObject to include ClockRate and HitWindows (#36630 )

This changes difficulty calculations to use `ClockRate` and `HitWindows`
from `DifficultyHitObjects` instead of providing them manually. It's
main purpose is unifying all the calculations to use the same source of
truth, and also allowing future work on supporting variable clockrates.

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>

StanR · 2026-02-10 20:01:51 +00:00

c8318d6edd

Nerf HD perfect stack reward (#36623 )

Safety measure to prevent potential major abuse maps.
The alternative is reducing nerf on multiplier (for example 5000 instead
of 2500), but increase nerf if rhythm is the same.

Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

Givy120 · 2026-02-10 13:18:16 +00:00

3a4631954f

Add early returns in HarmonicSkill and OsuDifficultyCalculator (#36644 )

StanR · 2026-02-10 08:10:34 +00:00

25d2c04787

Return zero rhythm difficulty for Swell and DrumRoll (#36628 )

Found in the middle of hitwindow usage refactor

StanR · 2026-02-08 23:30:04 +00:00

0d42b77da7

only nerf total cognition sum when reading > flashlight (#36599 )

Alternative to #36464 and #36487.

Reading and flashlight should be treated much more separately, since the
flashlight skill only accounts for object visibility and repetition, but
reading accounts for overlaps, high/low AR, etc. However, for certain
scores with very high reading (to the point of memorisation), the skill
indeed overlaps with flashlight.

This PR uses the normal strain sum exponent for reading and flashlight
(for player expectations), with an extra factor on flashlight to account
for the ease of adding flashlight to a partially memorised map when
reading is the dominant skill.

molneya · 2026-02-08 22:11:17 +05:00

0f709035cd

Add real sliderend check in rhythm (#36593 )

Classic blunder. See
https://discord.com/channels/546120878908506119/619291828054655016/1468738477297504489

StanR · 2026-02-05 17:38:59 +00:00

4eec06c1c3

Add a bunch of rhythm improvements (#36569 )

This does a couple of things:

- Adds slider->circle effective ratio adjustment
- Removes same polarity nerf for single delta count islands (which are
pretty much THE most unpredictable)
- Makes polarity nerf check actual deltas and not just the count
- Excludes spinners from ratio calculation

https://pp.huismetbenen.nl/rankings/players/minor-rhythm-improvements

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>

StanR · 2026-02-04 20:19:42 +00:00

52be3111b4

Change wide bonus distance reduction to be consistent with SpeedAim.SINGLE_SPACING_THRESHOLD (#36573 )

Slightly reducing aim/speedaim doubledipping, but mostly just done for
consistency and ease of understanding of existing relation between both

StanR · 2026-02-04 19:53:42 +00:00

8c180b00be

Simplify hidden difficulty calculation (#36465 )

It removes unnecessary function `DurationSpentInvisible` function that
just rescaled preempt.
Now it's just using preempt directly.
I've made multiplier to be very close to the current one, so pp deltas
should be minimal.

Givy120 · 2026-02-01 21:59:19 +00:00

ee0ac3eab4

Nerf aim strain for objects <radius (#36558 )

This should be a pretty simple fix for doubles being systemically broken
in aim. Doubles get essentially zero bonus from the aim eval itself -
wide & acute bonuses are zero due to the lack of distance, and velocity
is close to zero _again_ because of the lack of distance. However, the
delta times of these notes mean that `highBpmBonus` is very kind and
will buff the strain quite significantly.

This change means that the 2nd note of a double should get next to no
aim strain, which feels like correct behaviour. From testing, streams,
stacks etc. are essentially unchanged by this due to the fact its using
radius rather than diameter.

https://pp.huismetbenen.nl/rankings/players/doubles-strain

James Wilson · 2026-02-01 01:55:11 +05:00

355addc6ee

Adjust speed deviation scaling to be more harsh on low end (#36554 )

This should buff raw speed plays like Ivaxa Violation, at the same time
undoing part of the buff on the lower end scores like Save Me NM
Moved part of the multiplier out of the Pow to be more intuitive (it
multiplies the 20 by Pow(difficulty/4), so it's more clear that it would
be equal to 1 on difficulty = 4)
The scaling itself was adjusted to be more similar to live (so
buffs/nerfs on 98% acc remains +- the same through the difficulty curve)

Givy120 · 2026-01-30 18:18:07 +00:00

e9974ba43d

Fix flashlight having near-zero bonus when reading difficulty is much higher (#36487 )

There was a recent PR (https://github.com/ppy/osu/pull/36464) that was
aimed on accounting for the fact that getting your map partially
memorized with FL makes reading easier, so those bonuses shouldn't
reward full pp to each other.
But in cases where FL pp is significantly lower than reading it have
lead to cases where FL adds practically 0 additional pp.
This PR is adjusting a formula to account for cases like this.

FL reward on this map -
https://osu.ppy.sh/beatmapsets/1487999#osu/3259719 with EZHDHT(FL):
Full bonus: 408pp -> 486pp (+78pp)
Current: 408pp -> 424pp (+16pp)
This PR: 408pp -> 478pp (+70pp)

Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

Givy120 · 2026-01-29 16:31:41 +00:00

8be9317475

Undo slider high cs bonus hotfix (#36513 )

It existed for one map and now that that map is fine there's no need to
do it anymore.

StanR · 2026-01-29 20:55:18 +05:00

f57a271450

Make sliderless aim in fact sliderless (#29993 )

Part of this PR - https://github.com/ppy/osu/pull/27303

Current aim calculation have a flaw of sliderless aim still accounting
for sliders. This happens because of usage of `LazyJumpDistance` as a
main distance metric.

This PR is fixing this by adding `JumpDistance` as true sliderless
metric, using it instead of `LazyJumpDistance`.
This can introduce very rare cases where sliderless aim is worth more
than normal aim (because of velocity change bonus).

The effect of this is minimal on most of the maps. It can be seen the
best on this map - https://osu.ppy.sh/beatmapsets/594751#osu/1257904
Before:

![image](https://github.com/user-attachments/assets/e96773e6-3274-4ed6-8293-ed9bdfa213d0)

After:

![image](https://github.com/user-attachments/assets/126e861b-c28d-4ed4-a0db-f5305225a749)

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>
Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

Givy120 · 2026-01-27 20:23:22 +00:00

aefe31d315

Make reading and flashlight pp to be LP summed (#36464 )

Right now they're summed normally what opens a problem that FL rewards
too much pp when combined with reading map, since you're memorizing FL
anyway.

Co-authored-by: James Wilson <tsunyoku@gmail.com>

Givy120 · 2026-01-26 18:47:08 +00:00

ea87e82a91

Use deviation-based Speed accuracy scaling (#36475 )

https://pp.huismetbenen.nl/rankings/players/tap-statacc

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>

StanR · 2026-01-26 18:23:04 +00:00

ae43d3e3b1

Move TD difficulty reduction to Aim (#36476 )

StanR · 2026-01-26 14:23:44 +00:00

02b76db094

Move speed distance bonus to aim (#36168 )

This doesn't solve _flow_ aim in any way, but makes it so that `Speed`
doesn't have distance scaling (read as "aim") anymore which fixes some
issues related to that like the length bonus behaving incorrectly, and
in general `Speed` being an aim+tap skill instead of just a tapping
skill

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>

StanR · 2026-01-25 21:21:20 +00:00

0afcebe8bf

Replace current AR and HD bonuses with a new Reading skill on the osu! ruleset (#33196 )

This PR aims to replace the current bonuses used to award high approach
rates and scores made using the Hidden mod with a Reading skill that
takes into account each note's reading difficulty separately, Important
to note is the fact that as reading difficulty is now a skill the
bonuses are now additive instead of multiplicative, meaning there are
vast changes in deltas on the high and low end of scores. Due to the
nature of adding a new skill new difficulty and performance attributes
need to be added.

Huis page:
[https://pp.huismetbenen.nl/rankings/admin/kwotaq-reading](url)

---------

Co-authored-by: apollo-dw <83023433+apollo-dw@users.noreply.github.com>
Co-authored-by: js1086 <js1086@student.le.ac.uk>
Co-authored-by: tsunyoku <tsunyoku@gmail.com>
Co-authored-by: StanR <hi@stanr.info>

kwotaq · 2026-01-26 01:49:51 +05:00

562f1f8004

Use correct object for the aim slider bonus (#36216 )

Currently the slider bonus works on the assumption that the travel
velocity of the previous slider is a part of the current object's
difficulty because it is part of the movement from prev to curr.
However, this is contradicted by the fact that `currVelocity` is a
combination of prev->curr + curr slider velocity and is actually
breaking the assumption that slider difficulty is contained in the
slider itself that we take when calculating difficult slider strains.

This makes it so that the slider bonus difficulty is contained in the
slider itself instead of buffing the next object, which makes both the
calculation overall more consistent and the slider factor calculation
actually work as expected.

Aim multiplier got slightly lowered because this change makes most of
the sliders gain a little bit

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>

StanR · 2026-01-24 22:49:23 +00:00

c25820aa57

Improve angle calculation to better represent the path taken on sliders (#35555 )

## This pr resolves the issue with the angle calculation.
The old system calculated the angle between three objects. If the last
object was a long slider that the player needed to follow, the system
calculated the angle using only the slider’s end point and the previous
object, which caused long sliders to have incorrect angle values.

---------

Co-authored-by: StanR <hi@stanr.info>
Co-authored-by: James Wilson <tsunyoku@gmail.com>

Dark98 · 2026-01-24 22:05:59 +00:00

fb8d198a64

Replace Speed skill strain summation with a per-note harmonic sum (#34696 )

The purpose of this change is to remove the arbitrary note based length
bonus for speed and replace it with a more concrete per note difficulty
aware calculation. As a result of the summation needing to be per-note,
chunking and in consequence peak strain reduction have both been removed
from the skill. ~~The various strain counting functions also heavily
relied on chunking and the way summation worked, so they have also been
changed to match values held before the change as much as possible
(given the different summation some changes in values are bound to
happen).~~ Above was a bug.

Huis page:
[https://pp.huismetbenen.nl/rankings/players/length-bonus](https://pp.huismetbenen.nl/rankings/players/length-bonus)

---------

Co-authored-by: James Wilson <tsunyoku@gmail.com>

kwotaq · 2026-01-24 19:40:01 +00:00

520173e37d

Move strain's influence in the difficulty of a note based on deltaTime to the evaluator level (#36417 )

This PR moves the influence of d/t^2 from the skill (through strain)
directly into the evaluator level as a bonus applied at the end. This
makes it more clear what d/t^2 is, and the fact that it applies to *all*
bonuses in the evaluator. As well, the peak strain value of a note is
now equal to the evaluator value. This comes with a couple benefits:

1. The BPM weight is now subject to balance, and can be flattened easily
for a more "d/t" like system (previously this required hacky solutions)
2. StrainDecayBase becomes a much more useful variable now that it does
not affect the difficulty of the note itself. When adjusting this in
live, your star rating would double upon changing from 0.15 in aim to
0.3, and now it is intuitive what it does (makes strain take longer to
accumulate). This means that future balancing efforts can use evaluators
to dynamically adjust strainDecayBase (potentially letting large spikes
provide more strain for the same difficulty if they're wide angle, for
example).
3. In the object inspector, you get the actual maximum difficulty value
of a note as seen in the ObjectDifficulties list. This makes it easier
to tell what notes are deemed as harder by the system. For context,
previously, a note of difficulty 1 at 200bpm would cap out at 6 as a
result of strain, and a note of the same difficulty but at 300bpm would
cap out at 8.

The actual implementation is really really simple. I'm willing to move
this to flashlight if wanted (I don't think it's necessary), or even
abstract this away so that (1 - decay) doesn't look like a balancing
constant.

Side note: this is equivalent to live, except for notes with a deltaTime
of less than 25ms (since I am using AdjustedDeltaTime in the aim
evaluator for the bonus to avoid divisions by zero).

Natelytle · 2026-01-23 00:05:21 +05:00

2876cebdd7

Add comment for wiggle bonus multiplier (#36373 )

It's a common mistake by newer pp dev contributors to increase the
wiggle multiplier not knowing its at its maximum, so I added a comment
to try to avoid more people doing it.

---------

Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

kwotaq · 2026-01-18 13:56:23 +00:00

cda52cdae8

Fix legacy score base multiplier being calculated using modded difficulty values (#36209 )

Fun correctness bug.

ScoreV1 multiplier uses the **nomod** peppy stars (i.e the beatmap's
"base" HP, OD and CS) in all cases, which was generally the intention
with this code but it passes the wrong beatmap resulting in it using
modded values for this.

Cross referenced with stable and this now results in the expected
multipliers.

Results in some very minor (<3pp from my testing) changes for HR and EZ
scores with combo breaks.

James Wilson · 2026-01-17 09:30:37 +00:00

7fc24c6566

Improve fullcombo threshold formula (#35724 )

* Implement new portion formula

* Change the formula

* Use base value of 5 sliders

* Make the threshold harsher

---------

Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

Givy120 · 2026-01-04 00:51:45 +05:00

bcaf35dae7

Change the doubletapness scaling to be more punishing on the low end of the hitwindow (#36148 )

StanR · 2025-12-29 10:11:25 +00:00

dd261623cd

Add HarmonicSkill (#36153 )

* Add `OsuHarmonicSkill`

* Make `ProcessInternal` a sealed override

* Move to main game project

James Wilson · 2025-12-28 17:42:26 +00:00

c6441723b3

Extend Skill to include ObjectDifficulties (#36152 )

* Extend `Skill` to include `ObjectDifficulties`

* Remove generic

* Change `ObjectDifficulties` to be modifiable by children skills

* Fix tests

StanR · 2025-12-28 13:56:55 +00:00

a07d7ad4cb

Reduce calls to DifficultyValue where possible (#36112 )

James Wilson · 2025-12-23 00:41:24 +00:00

d150e27381

Use number calculated at runtime from DecayWeight (#33733 )

Replaces a constant that assumes DecayWeight == 0.9

Co-authored-by: James Wilson <tsunyoku@gmail.com>
Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

Nathan Corbett · 2025-12-23 00:16:01 +00:00

6356d50f13

change FL calc depending on HD settings (#33019 )

Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

Givy120 · 2025-12-23 04:50:35 +05:00

906df15cbe

Uses real distance in speed instead of mishandling variables (#35387 )

Co-authored-by: StanR <8269193+stanriders@users.noreply.github.com>

Nathan Corbett · 2025-12-22 22:58:31 +00:00

90e820b76a

Simplify osu! star rating calculations (#36063 )

* Simplify star rating calculations

* Refactor

StanR · 2025-12-19 12:59:22 +00:00

99daec3835

Use DifficultyCalculationUtils.Norm (#36064 )

StanR · 2025-12-18 18:19:16 +00:00

16c1adf0f7

Skip score-based miss count estimation for ScoreV2 (#35962 )

* Add basic scorev2 support

* Revert unnecessary score statistic changes

* Fix CI

* Revert changes

* Disable score-based misscount for scoreV2

Givy120 · 2025-12-13 12:29:20 +00:00

346461ffdc

Remove drain rate attribute (#35817 )

Givy120 · 2025-11-29 19:01:15 +00:00

1b230b3fdd

Reading bonus hotfix for Traceable mod (#35266 )

* Pass slider factor to visibility bonus correctly for TC

* Decrease reading bonuses for TC

James Wilson · 2025-10-13 13:34:57 +09:00

2025.1013.0 28c846b4d9

Quick play forward design work (#35253 )

* Remove unnecessary information from matchmaking beatmap panel

* Move avatar overlay inside card for better layout

* Allow higher jumping when jumping in succession

* Exclude player panel avatars from masking

* Adjust player panel animations a bit further

* Add avatar-only display mode

* Fix round warmup test not working

* Remove dead test scenes

* Fix edge case where users are added to not-yet-loaded card

* Decouple `PlayerPanel` from `UserPanel`

* Fix remaining test failure (and rename test to match new naming)

Dean Herbert · 2025-10-13 13:28:09 +09:00

8e36533f65

Merge pull request #35255 from dnfd1/rotate

Fix default origin in skin editor when rotating multiple objects

Bartłomiej Dach · 2025-10-10 12:19:53 +02:00

9ebc5b0a35

Merge pull request #35252 from bdach/song-select-present-sometimes-fails

Fix wrong beatmap shown when presenting a beatmap from results screen

Dean Herbert · 2025-10-10 14:54:50 +09:00

1f2928bf2f

75537 Commits