Silly checkmate against a computer while an update was running. :)
Well, I spent a significant amount of time trying to figure out what on earth you were talking about, imagining you must have been playing black (which was confusing because the board was upside down for that).
And then I clicked through to the larger version of your image and realized that Mastodon's image metadata indicators had betrayed me.
@dynamic bahaha yes, ok, lesson learned not to leave critical details in the corners