Throw 3 darts on each number and track your hits. 1 point per single hit, 2 for double and 3 for treble. Maximum 9 points per number. Click on the buttons or use the keypad numbers 1, 2 or 3 to track your hits. End with bull where 25 gives you 1 point and bulls eye 2.
In Normal mode you throw at 1-20 + Bull.
In Shanghai mode you get 12 points when you hit a Shanghai for the number and you throw at number 1 to 20.