You trying to imply a Hebrew poster is incriminating himself, using chins as a means of evading capture?
getting 'good' at pullups is about learning how to maximize leverage and momentum. Or losing weight.unless you've never trained your lats then its not about getting stronger, its about learning the groove of the lift by doing the lift.I can currently do 8 slow, controlled pullups. I could 'improve' my numbers by cheating or maybe becoming more neurologically efficient at the movement but I'm not going to dramatically increase my lat strength unless I up the dose
I guarantee if you weight 230-300 and do chin well you will have a good back ever grip the under hand curl grip is great for arms to hell pe