The Queen - diagonal moves

The white queen on a1 has a clear diagonal from a1-h16 and can occupy any of the squares shown.

The white queen on a9 has its path blocked by a piece of its own colour on c14 and so can only occupy the squares a10-c13.

The white queen on e1 has its path blocked by a black pawn on g6. It can occupy squares e2-g5 or capture the pawn on g6.