Math
Are there more chess games than atoms in the universe?
There are more possible chess games (Shannon's estimate: about 10¹²⁰) than atoms in the observable universe (about 10⁸⁰).
Source: Shannon (1950), Philosophical Magazine.
Context
Claude Shannon estimated the number of possible chess games at about 10¹²⁰ in his 1950 paper on programming a computer to play chess. The observable universe holds roughly 10⁸⁰ atoms.
The chess number is larger by a factor of 10⁴⁰. Shannon's figure is a rough bound and counts many absurd games, but even heavy pruning leaves a number no computer will ever enumerate. Chess engines win by judgement, not by listing games.
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