The queens can only move DIAGONALLY and ONE square at a time.
This is the hardest puzzle!!
Just move Qg7!<-----ANSWER:D
If I look at your first rule, it says the queens can only move DIAGONALLY. The queen move you just made is illegal based on your rules. Additionally, there is absolutely no way of forcing black into that position.
If you turn the board around it's diagonal!
anymore comments?