His virtual Dunkerbeck GPS Speed Callenge attracts hundreds of windsurfers to the world's speed courses. From 30 June, the fastest speed surfers - professionals and amateurs - will meet in the real waves for the official Speed World Championship in the south of Fuerteventura.
In co-operation with Fuerte Action, Dunki can even pay out 15,000 euros in prize money for the winners and runners-up.
Information is currently available at Facebook under "Dunkerbeck GPS Speed Challenge" .