18 Queens is Possible

EndgameStudier

That's what I'm saying, queens constantly pin each other and trap the king. Knights are unusually good at coordinated manuevring. When I say get back to starting position, I mean the 2 original kngihts on their squares and the promoted knights where the pawns were

MARattigan

I understood what you meant by getting the knights back to starting position, but I'll accept your argument if you can post a game that does that in less than the 79 moves in my queens example (which does the rooks as well as the queens)..