 Although not foolproof, because handicapping is still involved, there have been successful bettors throughout history who have applied this system.This is not to be confused with what constitutes a Dutch book which is when a bookmaker goes overbroke (the opposite to overround).It is thought the strategy behind Dutching was originally conceived and employed by Arthur Flegenheimer (also known as Dutch Schultz) alongside various rackets he had running at the racetrack.