A strange little side quest
Put BMO: Play Along with Me next to the history of puzzles and a few unexpected connections appear. The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. And the history keeps stacking up: In 1958, Tennis for Two used an analog computer and an oscilloscope to turn simple physics into a playable tennis-like demonstration. The details change, but the appeal of learning a system and trying again is remarkably persistent.