Yeah, sure it's a myth. Almost every GM and most chess players believe in that bullshit. I mean, if there are so many great players saying that the 1st turn advantage exsists, then how can it be true?
Yeah, but there are some that are smart and don't believe in this nonsense. You said "almsost every GM". Maybe I believe the minority?
Also, It might matter just a hare if you're over 2700. But there's no such thing as first move advantage under that rating, because so many mistakes are made anyways under that rating level...
At the club level, there is definitely no such thing.
At the expert level, there is no such thing.
At the master level, there is no such thing.
At the IM level, there is no such thing.
At the average GM level, there is probably no such thing.
At Kasparov level, it might mean a little, but so little that playing 1.a3 shouldn't hurt.
Yeah, sure it's a myth. Almost every GM and most chess players believe in that bullshit. I mean, if there are so many great players saying that the 1st turn advantage exsists, then how can it be true?