The Evolution of chin up vs pull up bodybuilding

https://augustvteg942.edublogs.org/2021/05/03/11-ways-to-completely-revamp-your-pull-ups-vs-chin-ups-biceps/

When hanging directly down on a bar you pull yourself up until your chin goes beyond the height of the bar. The distinction in between the 2 depend on the grip; a chin up has your palms facing you.