[Someone]

My guess/intuition is that the first player to move can win. I see two strategies that may work:

- use your queens ‘from the outside in’ to give check, forcing your opponent to take the queen giving check. In the long run, isolate an enemy queen in a corner, effectively removing it from play and giving you a surplus queen. Then, keep exchanging queens.

- use your queens to give check, forcing the queens near the enemy king to take them. Once the enemy king is isolated, it cannot move anymore, so giving check becomes dangerous. Black will have to either take the queen giving check or move a queen into the line of sight.