Four decades ago a gentleman gave me a book
after informing me he found it interesting. Although skeptical one of the subjects was former American World Chess Champion Bobby Fischer, and just as Jack suspected, I was hooked.
Before the match began I had compared the biorhythms of both competitors, World Chess Champion Magnus Carlsen and challenger Ian Nepomniachtchi. From a biorhythm perspective I knew the games played this weekend would be critical to the outcome of the match. After considering writing a post, I decided against it because I once posted something about biorhythms on the USCF forum and was excoriated for so doing. After the post, Biorhythms of Magnus Carsen and Fabiano Caruana (https://xpertchesslessons.wordpress.com/2018/11/07/biothythms-of-magnus-carlsen-vs-fabiano-caruana/) some questioned my sanity. The following charts are for December 5, 2021: