[Bug-XBoard] how to claim draw by rule (how is it handled in the protocol)

[Matthew Lai]

Hi,
Thank you for this great program. I am currently developing a new chess 
engine for it, and am having a question regarding how the protocol 
handles draws that need to be claimed (3 fold and 50 rep).

According to the FIDE rules, both draw by 3 fold and draw by 50 rep has 
to be claimed by either player, and is not automatic like a stalemate.

I understand how the engine can claim a draw by sending a result, but I 
don't see how the user can claim a draw (as opposed to offering a draw 
in which case the engine can decline).

Can someone please enlighten me on this matter?

Thank you very much
Matthew Lai