An entire 18 hole golf course in less space than a golf course? Sound impossible, well it is not with out Putting Challenge Ultimate Edition! 4 players can play on up to four separate 18 hole courses of up to 8? putts! Take the golf course indoors at your next event! A perfect rental for those rainy Portland winters. Patented sensors make each hole unique by changing the contour of the putting surface! This party game is sure to delight!