The ball should come into the 1-3 pocket at a right-to-left angle. Left-handers seek to throw the ball into the 1-2 pocket with a left-to-right angle. Angle is important on a strike shot because it helps the ball keep moving in its path rather than deflecting off the headpin. When that happens the chances of a strike drop significantly. A ball that hooks builds more right-to-left (for a right-hander) movement. The result is much stronger angle of entry into the 1-3 pocket. Even without a hook a right-hander can create some side angle by directing the ball toward the pocket from the right side of the lane. Typically, the second arrow from the right is suggested as a target. A good strike ball attacks from a strong side angle.