Start fighting many guidelines transforming into rules!
It say clarely "I'm a guideline", because in some cases and in a slider dependant manner, slider can say "i'll repeat!" or something like it.
Plus it's moreover a default skin based-rules. As you won't have problems playing with only-number or innerly-empty hitbursts.
Repeat arrows on sliders must be visible. Make sure that hitbursts (100s/300s/etc) from previous notes are not covering any repeat arrows or even the paths/ends of sliders (use the default skin to check if using hitbursts from another skin). This way, all sliders will be easily visible and playable.We start with this.
It say clarely "I'm a guideline", because in some cases and in a slider dependant manner, slider can say "i'll repeat!" or something like it.
Plus it's moreover a default skin based-rules. As you won't have problems playing with only-number or innerly-empty hitbursts.
Slider anchors/nodes must not be used to manipulate slider speeds (whether they are normal nodes or red ones). Using extra nodes to make a slider "wiggle" is usually fine, but using so many that the slider gets scrunched up (which also makes the sliderball go crazy) or become a "hold slider" is abuse of the hitobject's intended use and is not allowed. AIMod (shortcut ctrl+shift+a) will also point out sliders that move in an "abnormal" way, so make sure to check that if you're unsure of a slider.I do think it's someway good, sometime, to manipuplate slider speeds(even if not if it's so largely used) with nodes. So, let it become a guideline, and add the "abnormal moving" to the "Every slider must have a clear and visible path to follow from start to end." rule.
Hitcircles must never be hidden under slidertracks. Whether a hitcircle is partially or completely under a slidertrack, it is confusing for the player to read. Insane difficulties are the only exception to this rule.Can say it's a guideline, why? what's "approach-circle" needed for? A hitcircle put under a slider it's many time confusing, but sometime it provide fun and better gameplay, plus the approach circle make ou see there is a circle under it.