Golf is a precision club-and-ball sport, in which competing players (golfers), using many types of clubs, attempt to hit balls into each hole on a golf course while employing the fewest number of strokes. Golf is one of the few ball games that does not require a standardized playing area. Instead, the game is played on golf "courses", each of which features a unique design, although courses typically consist of either nine or 18 holes. A golf course consists of a series of holes, each with a teeing area that is set off by two markers showing the bounds of the legal tee area, fairway, rough and other hazards, and the putting green surrounded by the fringe with the pin (flagstick) and cup. The origin of golf is unclear and open to debate. The game is thought to have been introduced into Europe during the Middle Ages. Another early game that resembled modern golf was known as cambuca in England and chambot in France. Some observers, however, believe that golf descended from the Persian game, chaugán. In addition, kolven (a game involving a ball and curved bats) was played annually in Loenen, Netherlands, beginning in 1297, to commemorate the capture of the assassin of Floris V, a year earlier. According to the most widely accepted account, however, the modern game originated in Scotland around the 12th century, with shepherds knocking stones into rabbit holes on the current site of the Royal and Ancient Golf Club of St. Andrews.