9 Queens challenge

Hello Guys,

From the starting position, are you able to promote all white pawns to queens, in the smallest amount of moves ? You obviously cannot go below 40 moves (8x5 = 40)
I was able to do 40 :


Can you do the same but it needs to end with a checkmate ?

Black is not allowed to capture any pieces

If he cannot capture it is like a random mover bot challenge and the outcome will be random too...

It's not a chess game. It is a pure exercice with the board and the rule of chess. For this exercice you play both colors and try to make the challenge

I did it with both colors