No the darts world championship are annual but there are two darts organisations (BDO, PDC) they both have there own, but PDC players can't obviously enter the BDO one and visa versa. The PDC championship is held Lakeside
This is a rule in some versions of darts; the World Championships does not require it, for example.
I believe it was a mark of respect for Peter Evison, who's wife passed away.
World Darts Federation was created in 1976.
The location is the venue. The venue is almost always a bar/pub for league darts, but many local darts associations hold annual tournaments in hotel ballrooms.
PDC World Championship Darts happened in 2007.
PDC World Championship Darts was created in 2007.
World Professional Darts Championship was created in 1978.
The eye of the tiger
Based on the amount of world championships won, Phil 'The Power' Taylor is the best darts player in the world having won the world championship a massive 15 times. He has remained the top player in the world for the 20 years that he has been playing professionally, winning the world title for 15 of those 20 years. Phil is a gentleman and a dedicated professional constantly working on his game to remain at the top.
world championship 2 world masters 1 world darts trophy 1
According to the American Darts Organization the maximum length is 12" (30.5 cm). I assume it's the same elsewhere in the world since the ADO is a member of the World Darts Federation.