Capital Alphabets in Codechef username

How do we use Capital letters in codechef username field?

Unfortunately you can not. You have to follwo the regex (/^[a-z]{1}[a-z0-9_]{3,13}$/)for choosing the username.


There are people with capital alphabets to their name. eg

All the usernames with capital letters were created before the implementation of the aforesaid regex. Now, as they can not be deleted, they have become exceptions. But as for now, you can not create a username with capital letters.