Grandmasters decline with age. That's a given. There is nothing special about the age of 40, but age eventually takes its toll. That much is clear. Beyond that it's about how long you can put off the effects and compensate for them. Mistakes will crop in but you try to compensate for them with experience and hard work.
Viswanathan AnandParents, first and foremost, it is important to... understand and recognise the activities your child is naturally gravitating towards. It's important also to ensure that your child likes what he or she is doing. I believe in exposing children to as many hobbies and extracurricular activities as possible.
Viswanathan Anand