About Medium Mode
Two 6-picture boards and 8 seconds — the standard spot-the-difference challenge.
Good for: kids, families, classrooms, casual training.
About the Sherlock Holmes Theme
Conan Doyle's original Sherlock Holmes stories are in the public domain, so we're free to celebrate the great detective properly. Deerstalkers, magnifying glasses, dossiers and the fog of Victorian London await.