This is a misinterpretation of “Ten Duel Commandments”, which does not mention a 10-step nor a 9-stage approach for the duel itself, but the process of setting it up, of which at any point one may chicken out. The segment’s formulation of the process as ten points (which I’ll reproduce here from Wikipedia) is original but apparently does nicely sum up the rules:

1. Demand satisfaction. No dueling is necessary if they apologize.
2. If they do not apologize, choose someone to act as your second, your lieutenant.
3. Have your seconds negotiate a resolution, or the location and date for the duel.
4. If a duel is settled, choose your weapons and have a doctor present.
5. Duel before dawn.
6. Write a note for your next of kin.
7. Confess your sins.
8. Once again, have your seconds attempt to negotiate peace.
9. Aim no higher than the dueler's eye.
10. Count ten paces, then fire.

I've fenced with blunted rapiers, that's just a sport. No i think the danger has to be real to count, with proper swords, type to be either agreed upon by both parties or even better run what ya brung, and have at it. Combatants might yet be mortally wounded, but it's not a predetermined outcome.

That’s less than first blood