@cremieuxrecueil I would be curious to know how many people who say they know what femtosecond means could tell what value it is (10^-x ). I couldn't tell you that off the top of my head.
@chrisschenck@MichaelFKane You can play up to a very high level by understanding opening ideas (get your minor pieces out, castle, control the center), recognize when your opponent has made a mistake (tactics), and a bit of endgame pattern recognition. Until master level most games are decided by blunders.