It's a type of ladder checkmate.
Name of this checkmate

Firebrand. Yes, that is the game in question. I realised I could have played Qxd5+. Ok the knight can block, but after QxN, that's the kind of mate I'm talking about. I wondered if it had a name.

Without looking at the game, I think it is either the Butterfly mate or the Sandwich mate, or something like that.

the final position reminds me of the "Venetian Blinds Attack" when Rook(s) and /or Queen keep forcing / squeezing the opponent's King to one side of Board -- either vertically or horizontally. My friends called it this similar to the "blinds" on a curtain closing the lights one row at a time.
Here you administered the Mate in the Center of Board. Well played !!
I missed it in a recent game and gave checkmate another way, but I've often wondered if there's a name for a checkmate where the King is trapped over 3 files by 2 rooks and a Queen. Really annoyed I missed it because I've often wanted to get a mate like that.