Ten-pin bowling Effectively, there are three kinds of marks given in a score; a strike (all ten down in the first ball), a spare (all ten down by the second ball), and an open (one or more pins still standing after the second ball). A strike earns ten pins plus the pins for the next two balls thrown. (For example, if a player got a strike then followed with a 7 and 2 in the next frame, the value for the strike frame would be 10+7+2, or 19; if the player got a strike followed by another strike the next frame and
Ten-pin bowling off center without falling. The pins must show the name and mark of the maker, either "USBC Approved" or "BTBA Approved" and appear uniform. The maximum diameter of the ball is and the circumference of the ball must not be more than , and the ball cannot weigh more than 16 pounds (7.26 kg). Generally, the lightest ball available for use is 6 pounds (2.72 kg). The ball must have a smooth surface over its entire circumference except for holes or indentations used for gripping the ball, holes or indentations made to bring the ball back into compliance with weight-distribution