The aim is to hit the head pin without getting a strike. If you don’t hit the head pin or roll a strike, the score will be zero. The 1st ball of each frame is displayed and managed as a gutter (it counts zero and it does not add to the previous frame, in case it was a spare). To score, the ball must hit the head pin, and your score will be how many pins you knock down. If you hit 7, 6, 5 or 4 pins, you get a bonus that converts your score to 10 (displayed as a spare).