Re:No Causal Effect of Music Practice on Ability (2014) [pdf]
by sireat on Saturday February 10, 2018 @06:37PM
(#16350274)
Agreed that you need both talent and deliberate practice for chess but you also need to start early.
For becoming a chess GM you need 3 things: talent, grit(deliberate practice), starting early(10-12 is okay, 18 is too late these days).
One interesting aspect of starting early AND also persistent grit is being the youngest sibling in a chess family.
For example Hikaru had a master level older brother and of course there's Judith. The youngest siblings are ridiculously competitive against older ones.
Practice matters. Especially at the upper level. There are hordes of talented "strong casuals" out there.