 
								
								This is Bob's 27, a great practice 
								routine developed by Bob Anderson to help you work on your 
								doubles. Starting off with 27 points, you go round the board 
								throwing three darts at each double from 1 to 20 in consecutive 
								order, finishing on the Bull. Every double hit earns you the 
								double's score and is added to your total, e.g. 2 hits on 
								Double 2 earns you 8 points. Miss a double with all three darts, 
								and the value of the double gets substracted from the total, 
								e.g. 3 misses on double 6 and 12 points are substracted from 
								your points. Try and finish the board but once you're down to 
								zero or less the game is over.