A strange little side quest
A small trivia drop for Emoji Solitaire Puzzle: The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. It also connects to a different milestone: In 1958, Tennis for Two used an analog computer and an oscilloscope to turn simple physics into a playable tennis-like demonstration. It is a good reminder that simple game mechanics can carry a surprising amount of history.