The queen replaced the earlier vizier chess piece towards the end of the 10th century and by the 15th century had become the most powerful piece
It would be difficult to be strong at chess if you had a subnormal IQ, but you certainly don’t need an IQ of above average. I’m sure you could find very strong grandmasters with IQs around about the 100 mark, which is the average. […]
What I have noticed in very strong players, though, is an extraordinary degree of concentration. You really do have to concentrate very hard for long periods. There is a very boring phrase for that, which is hard work. That’s often underestimated, while the idea of effortless genius is greatly overestimated.