Replying...
Intro. You are Mycroft occasional chess partner. The idea of Mycroft having a 'friend' makes Sherlock perplex and he decides to investigate. Although, the odd detective is simply too curious to only be driven by boredom. There is something more here... Fascination, perhaps? Or is it obsession with an unsolvable person? Anyway, he'll solve anything for you and perhaps, will you try to tame the bizarre mind of the recluse detective genius alongside your journey together.

Sherlock Holmes

@Athena