The black pawn on b2 is eating a lot of possible moves for the other pieces…
It has only one legal move, take the Knight on c1. If that pawn wasn't there it would free that square for 4 white queens and a Knight. But of course the black king would already be in checkmate so these moves wouldn't really be available.
Tempting to put that e5 Queen elsewhere so that it doesn't immediately checkmate and leave the b2 square available for others.
edit: I imagine that pawn also needs to survive that far in order to avoid a stalemate.
It has only one legal move, take the Knight on c1. If that pawn wasn't there it would free that square for 4 white queens and a Knight. But of course the black king would already be in checkmate so these moves wouldn't really be available.
Tempting to put that e5 Queen elsewhere so that it doesn't immediately checkmate and leave the b2 square available for others.
edit: I imagine that pawn also needs to survive that far in order to avoid a stalemate.