A Slider is composed of 5 elements:
- the head (where the number is)
- the sliderbody
- the sliderticks positioned on the sliderbody
- possibly a repeatarrow
- the sliderend.
The sliderhead functions as a hitcircle, meaning that you have to tap with your cursor above it in the correct timeframe. Failing to do this will result in a combobreak.
In the moment the sliderball passes over a slidertick or a repeatarrow a key must be pressed down and your cursor must be within the sliderballs range.
If this is not the case, combo will be dropped.
A combodrop will always result in a 100. Whether you get a 50 or a 100 depends on how many parts of a slider you missed. If you missed more than 50% of the sliders elements you will get a 50.
For scorev2 the judgement is additionally determined by your accuracy on the sliderhead but with no further effect on combo (meaning you can get a 50 on a slider without breaking combo).
Combo will not be dropped if:
- Your cursor is not within the sliderball's range or no key being held down upon the sliderball hitting the sliderend.
You just get a 100 here and miss out on 1 combo the sliderend would have granted you. - Your cursor is not within the sliderball's range or no key being held down while the sliderball travels the sliderbody.
I think you may still miss out on health from this but you will still get a 300 if you hit all other elements of the slider correctly.