Europe's 'Schengen Shuffle' explained: Can it help you stay beyond 90 days? - The Economic Times

The Schengen Shuffle allows longer European stays by alternating between Schengen and non-Schengen nations. This unofficial strategy adheres strictly to the 90/180-day Schengen rule for all travellers. Time spent in countries like Albania and Montenegro does not count towards the Schengen limit.

Raccontata daeconomictimes.indiatimes.com