Brilliant Mate In 7 Chess Puzzle With 15 Queens

Here is a simply brilliant mate in 7 chess puzzle I came up with:

If you solved this without any hints, then you are a genius like me. Add me as a friend and I'll accept you within 5 hours if it is day time in the US. Also, follow me and please comment on what you think of this puzzle. I would really like to see what people think of it.