Some topics in chess strategy are more fashionable than others. This can happen for various reasons. For example, some topics may be easy to explain and understand. This is the case with the “good and bad bishop” theory. Or it might happen that some strategic phenomenon becomes a favourite topic of a famous chess writer. This happened, for example, with Nimzowitsch and the art of blocking passed pawns. In the following article we will look at a very striking example of this phenomenon. | Photo: Tigran Petrosian 1973, Dutch National Archives, The Hague, Algemeen Nederlandsch Fotobureau (Anefo)

