Ten-pin bowling ball contacts only the 1, 3, 5 and 9 pins; for a left-hander, the 1, 2, 5 and 8 pins. In order to count, a pin must be knocked over entirely. If the pin is wobbling as the automatic pin machine picks it up (or the machine itself knocks over the pin while it is wobbling), it is still considered standing and is not scored. Also, if a pin is moved, it does not change its designation. For example, if the 10 pin were still standing and the 7 pin slid into the 8 pin position, converting this spare would
Ten-pin bowling the first roll of a frame, and if all ten pins are knocked down on this shot, it is scored as a spare. Behind the foul line is an "approach" approximately long used to gain speed and leverage on the ball before delivering it. from the foul line, where the lane terminates, it is joined to a roughly deep by wide surface of durable and impact-resistant material called the "pin deck", upon which each rack of pins is set. The bowler is allowed 10 frames in which to knock down pins, with frames one (1) through nine (9) being composed