Set in the settings the ability to challenge you in Shatranj.
Correspondence against my engines on SchemingMind
~~It looks like SchemingMind doesn't seem to be able to save any changes I make to the settings.~~
I'll look into it.
Edit: I think I have fixed it for real now.

@chrisbao: Very interesting challenge but sorry, I can't right now. Generally I'm not a fan of playing against machines, but with a Shatranj machine is different, I would be glad test it! (and I will eventually). However it will not be any soon, because I have been being active for months (or a year) at SchemingMind, and now I'm planning to finish the last ongoing games and then take a long break. Perhaps I'm getting old and my brain needs to rest the more and more.
It has occurred to me that there is not really an accurate comparison between current shatranj engines (of which there are very few) and humans. To get some more accurate estimates, I'm hoping to have some weaker versions of my engine play correspondence on SchemingMind. If you want to try playing, please let me know and we can set up a game.
(My SchemingMind username is sscg13).