It’s not good! Forgetting your prep or mixing up something in sharp variations is absolutely deadly. Veteran Drawmeister Ftacnik found out just that in his game against some noname IM from iceland.
The guy is 61 and he tries to test the memory of a 31-year old engine player in a line that is known to be 100% dead. Come on!
The next day he invited another NN to repeat the Botvinnik. This time with more success, because his opponent bailed out. To be fair, playing the Botvinnik isn’t everyone’s cup of tea.
Why can’t every amateur just roll over like that?