Ten-pin bowling regulations, identification letters and numbers, and general wear from normal use. For much of the history of bowling, bowling balls were made using a three-piece construction method. Starting in the mid-1990s, however, most manufacturers switched to a two-piece method. In response to these innovative ball designs, the American Bowling Congress placed further restrictions on the technical characteristics of the ball such as the radius of gyration and hooking potential. A game of bowling consists of ten frames. In each frame, the bowler will have two chances to knock down as many pins as possible with their bowling ball. In games
Ten-pin bowling speed and certain type of bowling balls. If a bowler has a specific form of bowling suitable for a specific oil pattern, coupled with the right bowling ball, his margin of error is highly increased versus other bowlers. The result is that sometimes the bowler throwing the more accurate shot loses to the bowler who has created a larger "target area". Some advanced bowlers simplified this to: "To a large degree, the equipment and oil pattern determines the winner." At the end of 2007, the USBC completed a two-year study on bowling ball motion and how advanced, high-tech equipment may