Note: The yaxis is a rating of how well chess players compete against each other. This rating varies over time, from EDO to CMR to ELO, because different data sources cover different periods of time.

•••••••••••• Music By •••••••••••••
'Mind Over Matter''
Jay Man OurMusicBox
   / ourmusicbox  

"Rynos Theme" by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/b...

•••••••••••• Data Sources •••••••••••••
EDO Historical Chess Ratings by Rod Edwards (18091920)
http://www.edochess.ca/index.html

ChessMetrics Performance Ratings by Jeff Sonas (19102005)
(mistakenly says 1915 in the video)
http://www.chessmetrics.com/cm/

ELO ratings from the FIDE website (20002016)
https://ratings.fide.com/toplist.phtml

I used cubic interpolation between data points when necessary (EDO and ELO) and applied a 6month blur to the CMR data to make the lines smoother and easier to follow.