Which is greater? The number of atoms in the universe or the number of chess moves?

The question came from Claude Shannon, inventor of ‘Information Theory’ in 1948. The theory uses mathematics to understand the rules governing the transmission of messages through communication systems, applicable to everything from computer code, speech and music, to the dancing of bees.

The Secrets Of The Universe - This value, known as the Shannon Number represents all of the possible move variations in the game of chess. It is estimated to be between 10¹¹¹

Patrick Comerford: Counting possible chess moves, atoms in the universe, grains of sand and the number of stars

Königsplan' method: Life lessons from the world of chess, Sports

Which is greater? The number of atoms in the universe or the number of chess moves?

Is it true that the number of possible chess games is greater than the number of atoms in the Universe?, by Space

Artificial Intelligence had more difficulty cracking Go than Chess

SportsAndGames › There are more possible iterations in a game of chess than there are atoms in the universe.

Is “Go” Harder Than Chess? (Overview) - PPQTY

AnAn and Liah: Some Chess Trivia — Her Move Next

It has been suggested that there are more possible games of chess than atoms in the universe. Is this true, and how do we know this? - Quora