Why is this not checkmate? (I am black)

I can't believe people still think chess is flat

We are everywhere.

What do I do in this position? I’m Jim

White to play and win.

new checkmate combo jus dropped

holy reference

And thus, we may cross the universe

I feel like this belongs here

What about it?

Why this dog is so dench is beyond me. But absolutely a unit

Saw this today. Hope I'm in the right spot.

This Arouquesa in Portugal