"I'm sorry for being a little Beckmesser, but I'm wondering about some things:
The positions on the chessboard are the same at all pictures though it looks like one girl made a move at one image. The black king can't move but is not directly menaced. And there is also not a stalemate, because black can move a lot of other pieces. So why has black surrendered? And why isn't it shown that the girl moves Rb4xb8#, which is suggested by her hovering hand and would explain everything?"

Thanks a lot for correcting my links, that was an oversight.

About the chess game: LOL, I didn't think any guro fan would actually look at the chess board. Looking at the position of the pieces now I have no idea what I was thinking back then. It's definitely all wrong.