India, Dec. 2 -- If you have ever been to a film festival where a number of movies are playing simultaneously on different screens, the schedule may have sometimes forced you to miss a few you wanted to watch. At larger festivals, the organisers will likely ensure that the latest releases from top directors are never screened simultaneously. At smaller festivals showing a retrospective of a departed director, however,

you may have to choose between two or more movies playing at the same time.

Such situations can provide the setting for an Einstein or zebra puzzle. Like the one below.

#Puzzle 119.1

An Alfred Hitchcock retrospective is playing at a multiplex that has four screens housed in four halls. The halls are aligned in a row from...