There's a thingy actually called "Analysis board" that allows pretty much unlimited takebacks.
Takeback after I made a mistake?
Ask for a take back? What nonsense is this?
I want to play without takebacks. It's not nonsense pooey fodder. I made a mistake but I played on. Either you get it or you don't. Viva Las Vegas and free Scotland, Palestine, Uyghurs, Tibetans, American Indians, bison, and homeless shrimp!!!
My opponent played Rb8 after I played Rb1. I realized it was a mistake but my opponent didn't do anything after Rb1. However, after Rb8 "Takeback requested".
There should be a rule, if you ask for a takeback, it should include your opponent's move too. If they wanted a takeback then I would want a takeback too with Rb1.