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 clockwise (for right handers) or counter clockwise (for left handers) upon release of the ball. Like a conventional release that generates hook, this technique will also cause the ball to move in a curved path rather than in a straight line. However a right handed backup will follow a left handed conventional path, and a left handed backup will follow a right handed conventional path. This style of bowling can be significantly harder to learn for new bowlers and there is increased risk of injury to the wrist, especially when heavier balls are used. However, a right handed backup bowler