I'm a decent Mario player but one thing that's driving me crazy is this stupid 1-2 jump you know that one that you have to do if you don't want to be hit by a koopa or a goomba. Does anyone have a solution I'm playing on a original nes but pal version I have watched every single one of yt tutorials. Please help.

try holding left for a little bit after you jump over the koopa. it makes that jump so much easier. im not too familiar with the pal version but from what ive played of it, it should be the same in this regard