Chess is booming: the online chess portals report new records in players and games almost daily, and on Netflix the series “The Queen’s Gambit” is celebrating viewer records.

A small “record” is a welcome addition: The German Kindle edition of the slim little volume “Online Chess for Amateur and Hobby Players” makes it to No. 1 on the bestseller list in the chess category today. Only playing is better than reading ­čśë.