A strange little side quest
A small trivia drop for Wolfoo Spot The Difference: Alexey Pajitnov created Tetris in 1984 after drawing inspiration from pentomino puzzles, then simplified the idea around shapes made from four squares. The broader history adds one more wrinkle. Reader Rabbit's 1986 arrival was part of a major expansion of educational computer software before the CD-ROM boom of the 1990s. The screen is modern; the urge to test skill, pattern and timing definitely is not.