I was very, very thorough, making sure I really understood how that telescope worked, and that it was working properly. I was quite convinced that I wasn't clever enough to be in Cambridge and would be thrown out at some stage. My policy was to work as hard as I could so that I'd know I'd done my best. We now label this as impostor syndrome, but we didn't recognise, and certainly didn't name it, back then.

Well, yes, no, I certainly visualise … it was really … I had to have a very good idea of the geometry – that was crucial. Spacetime geometry so it's not three dimensions, you have to think of the whole four dimensional spacetime, and I get sort of used to thinking about four dimensions and using various tricks to get the picture properly. I do most of my thinking in visual terms, and I'm a very visual thinker rather than writing down equations.

When I have a lot of pain, I try to confuse my mind to forget about the pain and think about the distance. I don't want pain to be in my mind, because I'd really lose focus on running. After winning, you won't have that pain, but it comes later. The marathon is hard; the second day, you don't go up or down stairs.

For me, to be a writer is to acknowledge the secret wounds that we carry inside us, the wounds so secret that we ourselves are barely aware of them, and to patiently explore them, know them, illuminate them, to own these pains and wounds, and to make them a conscious part of our spirits and our writing. A writer talks of things that everyone knows but does not know they know.

I would want to be a role model. As you talk about an athlete who wakes up at seven every day, then you have two training sessions...for me, it's not like that. I definitely think about chess all the time. I work at chess every day but it's not like I have a routine. It's always been based on inspiration for me. Fortunately, I haven't run out of inspiration yet...Sometimes I play better when I haven't slept that much, because you kind of play more creative.

Not very well. I try to win the next one. I've always been told that you should win and lose with a smile, but since I became a professional, I've thought the best way of learning to deal with defeat is not to lose.