John "Darkie" Smith trained a boxer who scored victories over six what?
Darkie Smith:  These fighters include European Heavyweight Champion Zeljko Mavrovic and future world champion Chris Eubank. Chris Eubank: Christopher Livingstone Eubanks (born 8 August 1966), known as Chris Eubank, is a British former professional boxer who competed from 1985 to 1998. Chris Eubank:  He held the WBO middleweight and super-middleweight titles, scoring victories over six world champions, and is ranked by BoxRec as the third best British super-middleweight boxer of all time.
i don't know