Index
Checks listing
Audio
Compose
Abnormal amount of slider nodes
Abnormally large spacing
Ambiguous slider intersection
Burai slider
Column usage
Concurrent hit objects
Consecutive basic-snapped hyperdashes
Contains hyperdashes
Contains hyperdashes on repeat or droplet
Disallowed hyperdash snap
Edge dashes
Higher-snapped hyperdash
Invisible sliders
Kiai inconsistencies
Missing spinner
Obscured reverse arrows
Offscreen hit objects
Pattern Lengths
Rest moments
Slider only section
Spinner gap too small
Spinner readability
Too high combo
Too many consecutive hyperdashes
Too short drain time
Too short long notes (less than 30ms)
Too short spinner
Unrankable finishers
Unrankable snapping
Unsnapped last note hiding barline
Design
Hit Sounds
Metadata
Resources
Settings
Abnormal difficulty settings
Default combo colours without forced skin
Difficulty settings outside of the guideline range
Difficulty settings outside of the guideline range
Inconsistent mapset id, countdown, epilepsy warning, etc
OD/HP Values too high
OD/HP values too high/low
Score overflow
Slider tick rates not aligning with any common beat snap divisor
Too dark or bright combo colours or slider borders
Spread
Chord too big for its difficulty
Lowest difficulty too difficult for the given drain/play time(s)
Multiple reverses on too short sliders
Object too close or far away from previous
Objects close in time not overlapping
Perfect stacks too close in time
Perfect stacks too close in time with Hard Rock applied
Too short sliders
Too short spinner time or spinner recovery time
Timing
Abnormal Slider Velocity changes on lower difficulties found
Barline is unaffected by a line very close to it
Concurrent or conflicting timing lines
Double barlines
First line toggles kiai or is inherited
Hit object is unaffected by a line very close to it
Hit objects potentially snapped to the wrong red line
Inconsistent omitted bar lines
Inconsistent or unset preview time
Inconsistent uninherited lines, meter signatures, or BPM
Invalid timing line volume
Kiai flashes
Scroll speed changes on lower difficulties
Unnormalized inherited timing lines found
Unsnapped hit objects
Unsnapped kiai
Unused timing lines
Wrongly or inconsistently snapped hit objects
Index
Checks listing
Audio
Compose
Abnormal amount of slider nodes
Abnormally large spacing
Ambiguous slider intersection
Burai slider
Column usage
Concurrent hit objects
Consecutive basic-snapped hyperdashes
Contains hyperdashes
Contains hyperdashes on repeat or droplet
Disallowed hyperdash snap
Edge dashes
Higher-snapped hyperdash
Invisible sliders
Kiai inconsistencies
Missing spinner
Obscured reverse arrows
Offscreen hit objects
Pattern Lengths
Rest moments
Slider only section
Spinner gap too small
Spinner readability
Too high combo
Too many consecutive hyperdashes
Too short drain time
Too short long notes (less than 30ms)
Too short spinner
Unrankable finishers
Unrankable snapping
Unsnapped last note hiding barline
Design
Hit Sounds
Metadata
Resources
Settings
Abnormal difficulty settings
Default combo colours without forced skin
Difficulty settings outside of the guideline range
Difficulty settings outside of the guideline range
Inconsistent mapset id, countdown, epilepsy warning, etc
OD/HP Values too high
OD/HP values too high/low
Score overflow
Slider tick rates not aligning with any common beat snap divisor
Too dark or bright combo colours or slider borders
Spread
Chord too big for its difficulty
Lowest difficulty too difficult for the given drain/play time(s)
Multiple reverses on too short sliders
Object too close or far away from previous
Objects close in time not overlapping
Perfect stacks too close in time
Perfect stacks too close in time with Hard Rock applied
Too short sliders
Too short spinner time or spinner recovery time
Timing
Abnormal Slider Velocity changes on lower difficulties found
Barline is unaffected by a line very close to it
Concurrent or conflicting timing lines
Double barlines
First line toggles kiai or is inherited
Hit object is unaffected by a line very close to it
Hit objects potentially snapped to the wrong red line
Inconsistent omitted bar lines
Inconsistent or unset preview time
Inconsistent uninherited lines, meter signatures, or BPM
Invalid timing line volume
Kiai flashes
Scroll speed changes on lower difficulties
Unnormalized inherited timing lines found
Unsnapped hit objects
Unsnapped kiai
Unused timing lines
Wrongly or inconsistently snapped hit objects
Checks
/ Files
Unused files
Files
General
Author: Naxess
Purpose
Reducing the overall file size of beatmapset folders and preventing potentially malicious files from reaching the player.
Reasoning
Outcomes
Unused
"path"
Cause: A file in the song folder is not used in any of the .osu or .osb files. Includes unused .osb files. Ignores thumbs.db.
Unused Overridden
"path", likely due to "path with different extension" being used instead.
Cause: Same as the other check, but where a file with the same name is used.
Lazer Only
"path" is not used in osu!(stable), but may be used in osu!(lazer).
Cause: A beatmap skin file documented as Lazer-only (e.g. fountain-shoot, grade-specific applause, slider miss indicators). See https://osu.ppy.sh/wiki/en/Skinning/Sounds and https://osu.ppy.sh/wiki/en/Skinning/osu!