You guys are correct. The Trompowsky was used in 2016 by the World Champion and was believed to be a nod to Trump's election victory. 3 Bxf6, from Scheller's text message, is the actual move used by Trompowsky in Munich in 1936 to cause a handy resignation from the opponent on move 24: it was indeed a kill attack. He also says he's outmaneuvering and hints he's working like Q. I saw "C4" (capitalized) in that message and c4 was Trompowsky's move 5, so I'm not sure how that's intended because it's a bit out of order unless he's been dropping other moves too. More links.