Usability of Ctrl + Enter Submitting of Forms

In my web app I want to give the possibility of submitting every form with Ctrl + Enter shortcut.

What is better:

  • submit the form with keyboard only when one of the fields of this form is focused

  • remember the last active form (in which an element was focused), then on Ctrl + Enter (if nothing is active at the moment) check that last active form is completed: if yes - submit it, if no - focus on missing field and highlight it.

I like the second option more because it also deals with multiple forms on a page and overall looks more flexible.

I am looking for your advice.