Only his latest two successes shall be quoted here, as your author never could do justice to Mr. Benkö.
We read on the US Chess Federation website that in August 2018 in Chess Life, Benkö published an article on Stefan Zweig's "Schachnovelle" ("The Royal Game", PDF of the article is linked from the USCF), putting it into a problem form. For the article he received the "Special Achievement" award of the Chess Journalists of America.
His latest chess problem was posthumously published by Susan Polgar. Possibly with this Benkö has set himself a monument to be quoted in books in the future, a puzzle so brilliant that every living master would be proud of it. I have not yet found the solution even though I deduced what the plan and final position should be. The also Hungarian-American master Susan Polgar, also a chess composer herself, showed Benkö's problem:
This is a a Help Mate Composition! From the starting position, White starts the game and checkmates Black by En Passant on the 9th move!
In addition, the game MUST include all the SPECIAL chess moves (at least from one side) such as Pawn Promotion, Castling, En Passant (in addition to the final checkmate), and Discovered Check. There is only one possible solution (according to Benko himself).
He was very proud of this Help Mate Masterpiece and asked me to share it with all of you! This was his final request to me.
Enjoy!
If this is correct, it needs to be reprinted in anthologies! The initial position of the chess game is given, to avoid confusion, i.e. this is a "Shortest Proof Game" or "Proof Game", depending on your point of view.
