Read the citation once again; why all three are indicators for intellectual superiority is because they are cognitively demanding. Now this is not just my opinion, but also the opinions of those respective scientists that do know more than me in their respective fields. You have none sources to support your argument, and your examples (soccer, politic, chess computer) does not even correlate with the fundamental properties that links all the previous three (Chess, Nobel Prizes, Turing Awards) together which is cognitive ability.
EDIT:
Your description of Chess made me speechless.
Chess is only there because it is linked to winning awards and prices. A lot of people that won a noble price are also good at chess, ergo, being good at chess means youre smart, because other good chess players won noble prices. If the top and subtop of chess players never ever won any noble price, chess wouldnt be there. The fact that it is cognitively demanding isnt a argument. Playing tabletop wargames is also cognitively demanding (its chess with more variables!). Does that make people who play Warhammer all intellectually superior to people who dont? Dungeons and Dragons is also more cognitively demanding then athletic sports, so does that make Dungeons and Dragons players intellectually superior to people who do an athletic sport?
Thats why my chess computer example DOES make sense. A chess computer can be the best at chess, and never win any noble prices or Turing awards. In fact, you can create a whole army of chess computers that win from humans, replacing the entire top of chess players with computers, and no one would say those computers are intellectually superior compared to humans, only because they beat humans at one game.
Yes, there is a link, a correlation between being good at chess and being intellectual. However, being good at chess doesnt make you automatically mean you have a superior intellect then the average human. Your article only cites that there is a link.
EDIT
The link you provided is absolutely pathetic. Ive come to expect better sources from you.
"How could chess possibly improve English skills? The young students learned to make connections based on chess moves; This helped them connect different aspects of what they read in English courses & texts. Thus, the ability to make connections improves the overall IQ score."
Has nothing to do with chess, but with making connections, a well known method of studying, and not only for verbal skills. Chess can be used to make the connections, but so could any well known surrounding, hell, even made up fantasy landscapes. (Loci method is a very old method and famous method which relies heavily on linking things with mental images.
http://en.wikipedia.org/wiki/Loci_Method)
"Chess has been shown to raise student's overall IQ scores. A Venezuelan study involving 4,000 second grade students found a significant increase in their IQ scores after only 4.5 months of systematically studying chess. Tournament chess games, which bind each player to make his move within the stipulated time, hone one's ability to perform under pressure, mimicking environments of most school and competitive exams."
Short term improvements of the IQ are extremely unreliable, go ask any psychologist. The reason for the improvement is already hinted in the article itself, saying that it prepares for testing, or standardized tests. Standardized IQ tests become worthless if people are prepared before hand. On top of that, short term IQ scores can fluctuate pretty wildly, while long term IQ scores tend to remain the same. It has to do with the way IQ is calculated based on the persons age. Learning ahead can make you seem smarter on the short term because you know more then the average person for your age. But unless you are persistently ahead of people from your age, your long term IQ will drop again to normal levels.
"The ability to perceive possibilities for movement is particularly crucial to chess thinking, as is the capacity to build up a system of knowledge and experience. Chess thinking often involves a complex, hierarchical structure of problems and sub-problems, and the capacity for retaining and manipulating such complex structures of data concurrently never deviating from the goals, all correlate with having a high IQ"
Author didnt bother to cite the sources he got that from. On top of that, he specifically mentions building up a certain system or structure and working with it. Which can be trained to be chess specific.
"Chess studying and playing involves six out of seven factors of the modern IQ test model. Hence subscribing to it would warranty improvement in your performance in IQ tests as per the verdicts of researchers. So if you have never felt the chessboard its time you star"arranging your pawns!"
Obviously the author has never done an IQ test himself. Word knowledge, reciting numbers forwards and backwards, general knowledge about the world, basic math, etc have nothing to do with chess, yet those are the things asked in an IQ test (at leas the Weschler Intelligence Scale for Children and the Weschler Adult Intelligence Scale).
http://en.wikipedia.org/wiki/Wechsler_Intelligence_Scale_for_Children#Uses
http://en.wikipedia.org/wiki/Wechsler_Adult_Intelligence_Scale#Standardization