On Apr 1, 6:06*pm, "Chess One" wrote:

Mike thinks Korchnoi is older than Sapssky,

Mike is correct, then. Korchnoi is almost seven years older than
Spassky. Their dates of birth, as given in Gaige's "Chess Personalia":

Korchnoi: 23 March 1931

Spassky: 30 January 1937