Can you do that under 100 moves?
18 Queens is Possible

Yeah, I can. It takes alot of manuevring to get the queens and kings where they should be. I will re-attempt.

Here U go, 91 moves! I optimized the moves by moving queens to the 2nd rank as soon as possible to the 2nd rank before promoting other pawns. This saved moves because I didn't have to deal with maneuvering the queens around without checks or pinning other queens to the kings.

Who's better here? Has anybody analyzed this game using a computer chess program such as Stockfish?
Also, is 3.Nb6 a novelty? Looks interesting but slightly weakening for white.
Here's a game that results in 18 queens, with the rooks on the board as a bonus. This was very Tedious to construct.