World Chess Championship - Wikipedia
https://en.wikipedia.org/wiki/World_Chess_ChampionshipA series of players regarded as the strongest (or at least the most famous) in the world extends back hundreds of years, and these players are sometimes considered the world champions of their time. They include Ruy López de Segura around 1560, Paolo Boi and Leonardo da Cutri around 1575, Alessandro Salvio around 1600, and Gioachino Grecoaround 1623. In the 18th and early 19t…