A Chess Club Event through chess.com?

I teach mathematics a a detention home.  I also try to run a chess club after school at this same facility.  Tomorrow I want to organize a chess event between a few of my students and four or so students who are in the chess club at one of the area high schools.  As my kids are incarcerated they cannot go to the other school nor can outside students come here, and my kids' identities must remain secret.  So we decided o an online format for our informal little match to see where our kids stand.  The sponsor at the other school suggested that we play here. The issue is that my students cannot have accounts of their own, nor can their identities be revealed, for legal confidentiality reasons.  Can I create accounts for my kids to use?  How many>  Do they need formal accounts at all?  Do I need a different email registered to a different person for each account?

Yes different emails for different people.