The Disappearance of Mr. Davenheim - a Hercule Poirot Short Story

I believe this is the story someone confused with ‘The Million Dollar Bank Robbery' because I saw a review saying he solves a crime without leaving his armchair and obviously that is this story instead. Poirot makes a bet with Japp that he can solve the case without leaving... although this includes updates from Japp and he is allowed to ask for things (pretty much the same as being there...???). I liked how both Poirot and Japp thought it was like stealing from a child from their POV with the bet. Otherwise it was as silly and ridiculous as most of the other short stories, but enjoyable nonetheless.