I think anyone skilled in any field would qualify as crazy by a simple metric. What it all comes down to is their social skills and their speaking skills.
10 Personality Disorders of Chess Players
There are plenty of good chess players who are normal, intelligent multi-skilled adults. Some are doctors, lawyers, and even CEOs. They are not very well-known, but it's mainly just due to the large number of autistic people who play. There are many normal ones though, who have intelligence, lateral thinking skills, speaking skills, social awareness, and the ability to work hard and be reliable across domains. Some examples: GM Tomi Nyback, IM Mikael Agopov, GM Patrick Wolff, etc.
hartofgoldrubinstein wrote:
I think anyone skilled in any field would qualify as crazy by a simple metric. What it all comes down to is their social skills and their speaking skills.
You nailed it. Professional chess requires little communication skill. Chess coaches are generally on the normal side And many chess professionals are college dropouts depriving themselves to improve communication skills.
Well said bong711. I have never heard of most of the top chess coaches, say, on the ICC "best-selling coaches" list, but I am pretty sure they could not get their spots by being bad at communicating ideas. I think that the normal chess professionals should make themselves known and be vocal via writing or YouTube videos. There are few enough of them that each of them could probably become quite popular.
As many rely on passive learning like videos and audios, personality disorders will be prevalent. Coaches and teachers are still best. Especially in a class environment.
And yet, world class Candyland players get by with no comment.
Candyland is unknown to me. I played Monopoly. I was surprised it existed since 1949 (Source: Wikipedia)
Twpsyn wrote:
DrSpudnik wrote:
All a diagnosis is is you going to a doctor and telling him what's wrong with you and then he translates it into some kind of Latin or Greek pidgin nonsense.
Yurm no. My autism diagnosis included developmental reports, screening with the AQ and EQ (Baron-Cohen), friendship quiestionare, social stories questionnaire, DISCO and a cognitive assessment report. Also if you think it’s easy getting an official diagnosis for let’s say schizophrenia, I suggest you visit a psychiatrist and try and convince him/her.
My experience with doctors is entirely limited to physical ailments, like when you go and say you have a pain in your chest and he tells you you have angina pectoris....which means exactly what you told him but in Latin and for $300.
DrSpudnik wrote:
My experience with doctors is entirely limited to physical ailments, like when you go and say you have a pain in your chest and he tells you you have angina pectoris....which means exactly what you told him but in Latin and for $300.
@DrSpudnik - amaaazing, we're patients of the same doctor! 
There's a lot of that going around.
1-2 termination coming for you 
That is a strong argument. However, there are links between creativity and mental illness. People like John Nash who got treated for mental illness later complained that they lost most of their creativity with their illness.>>
Mental illnesses usually consist at least in part of delusions .... for instance, that a person has unusual creativity.