Paul Tröger loses, Vincent Keymer wins

Chess, like many things in life, is enhanced by pattern recognition, if those patterns are applied correctly. While recently browsing through chess magazines, I recognized that I had seen a discovered attack that happened there in a book by Paul Tröger.

Tröger - Rosen

Bad Pyrmont 1976, German championship

White to move

Paul Tröger started with 2 out of 2 points, and the third game saw him in a drawn endgame where we "tune in" with the diagram. Having given the check on b6 twice already, all he had to do was write down the move Rb6+, stop the clock and call the arbiter to claim a draw. Instead he played 1.Rb8?? and had to resign after 1.-R:c4! 2.K:c4 d5+ and eventually lost. Rosen added insult to injury, telling Tröger that he only didn't offer draw because he was sure Tröger would eventually play Rb8. (Source: Paul Tröger: "Von Böcken und dicken Hunden". Bamberger Schachverlag 1984)

Grandelius - Keymer

Wijk aan Zee 2020

White to move

The young German talent Vincent Keymer had a great performance at his debut in Wijk, sharing the 6th place in the "Challengers" with Sarin and winning 19 Elo with a performance of over 2600. Nils Grandelius helped out by playing 44.Ra8? c5! 45.Ra6+ Kf5 46.Ra5? instead of still drawing by 46.Rf6+ Kg5 47.Be5. After 46.-f3+ 47.Kf2 Rh2+ 48.Kg1 f2+ White resigned.