Beyond humane power of will, and consistency.
Nothing more, nothing less.
I had zero books, zero coaches (except ofcourse my passed grandpa who taught me the rules when I was 5 and not really interested unless I got to set up the position.)
and I learned chess by myself, and in a period of over 5 years playing, I can beat FM's, IM's and at sometimes even GM's.
I would use every spare wasted moment to play chess, even if I wasn't seriously playing I would play blitz games intuitively, I would not waste one moment that could be wasted without playing chess, I beat everyone at the parks, at school, at informal tournaments, and I simply in the worst of moments, of my deepest of depression, chess was there for me, I loved it, I won, I lost, I wanted to die, I made terrible blunders, I hated the game, then I loved the game, then realized I hated my play, not the game, the game is pure, my play is not... so let me not digress because I hate these types of emotional wound ups, my POINT is PRACTICE, PRACTICE MAKES A GOOD PLAYER, CONSTANT AND EVEN AT TIMES UNCONSCIOUS PRACTICE, UNTIL YOU IT HAS SUBLIMINALLY FILTERED INTO YOUR BRAIN CELLS.
What are the qualities to make someone a good chess player?
Is it about intelligence, about practice, about concentration?
Are these qualities given to by birth, or do you gain these by expirience or by time?
Is it true that everybody might become a GM? Or just those who are gifted?
In short: Which qualities/charasteristics/experiences are needed te make someone a good chess player?
Practice, willingness, and some help from strong players (either a coach or clubmates). Good nerves are an asset for OTB play too.