Molson Hart

NERDS!

Nah, you need something more forcing

Sorry, did not get the nomenclature right, NERDS! WQf4. . . Check Second moves: BKb8, not possible because WQ position at f4. BKd8, not possible because WB position at f6. BKd6, not possible because WQ position at f4. If BKc8, WRa8, Checkmate. If BKb6, WBd8, Checkmate.

First move not right though.

How is WQf4. . . Check Second moves: BKb8, not possible because WQ position at f4. BKd8, not possible because WB position at f6. BKd6, not possible because WQ position at f4. If BKc8, WRa8, Checkmate. If BKb6, WBd8, Checkmate. Not the solution?

I can tell you, but it might be more fun for you to figure it out. All your King move analysis is right.

So the more nuanced thing is he can move BPd7 to BPd6 to remove teh initial check instead of moving BK.