Bobby Fischer claims to be the World Chess Champion
Karpov is the FIDE World Chess Champion
Kasparov is the PCA World Chess Champion
IBM Computer DEEP Blue defeated Karpov in a match
I have only two games to view now, more to follow at a later date.
Chess match: WGM Belakovskaia vs. SSGT Farrell
Chess match: Tim vs. Duffy_SKR