Ten-pin bowling back row, then three, then two, and finally one in the front at the center of the lane. To ease communication, pins are numbered one through ten, starting with "head pin" in front, and ending with ten in the back to the right. Because of the spacing of the pins and the size of the ball (about in diameter), it is impossible for the ball to contact all pins. Therefore, a tactical shot is required, which would result in a chain reaction of pin hitting pin in a process called "pin scatter". In an ideal shot for a right-hander, the
Ten-pin bowling is on top of the ball with two fingers in the 12-o'clock position and the thumb ending in the 6-o'clock position, at which point the fingers and thumb release the ball simultaneously. The forearm also creates spin and pushes the ball onto the lane. Spinning is difficult to master, and can cause injury if not done properly. Using a lighter bowling ball (10 to 12 pounds) with a completely rounded core is recommended, along with a conventional grip. Spinning causes results like a weak 5-pin more frequently. The backup style of bowling is where the bowler will flick their wrist