A strange little side quest
DD Slices may feel immediate, but the ideas around puzzles have been evolving for a very long time. Arthur Wynne published a diamond-shaped 'Word-Cross' in the New York World on December 21, 1913; the name later shifted to 'Cross-Word' and then 'crossword'. There is another connection worth keeping in the same mental pocket: In 1958, Tennis for Two used an analog computer and an oscilloscope to turn simple physics into a playable tennis-like demonstration. Grombi files that under: small game, surprisingly large backstory.
