 Complete the following phrase:  The IBSF World Snooker Championship also known as the World Amateur Snooker Championship is the premier non-professional snooker tournament in the world. The event series is sanctioned by the International Billiards and Snooker Federation. A number of IBSF champions have gone on to successful careers in the Pro ranks, notably Jimmy White 1980, James Wattana 1988, Ken Doherty 1989, Stuart Bingham 1996, Marco Fu 1997, Stephen Maguire 2000 and Mark Allen 2004. Both Ken Doherty in 1997 and Stuart Bingham in 