Lane Law

In competitive 10-pin bowling, each player has 10 frames, each of which consists of two attempts to knock down as many pins as possible. One point is scored for every pin that is knocked down. Contestants who demolish all 10 pins at the first attempt are awared a strike, for which they earn a score of 10 points plus a bonus of the total of their next two shots. If the player knocks down all 10 pins in two attempts, he or she is awarded a spare and earns 10 points plus a bonus of the pins knocked down on the next shot. If there is still at least one pin standing after the second attempt, it is called an open frame.

The Perfect Game

Bowlers who score a strike every time they throw will score 30 points per frame. If they then get another strike in the tenth and final frame, they are awarded two extra balls. If these are also strikes, the bowler scores the maximum 300 points and has played the perfect game.