How Bowling Scoring Works (Strikes, Spares, Frame 10)
A game of bowling has 10 frames, and each frame normally gives you two chances to knock down all 10 pins. Knocking down all 10 on your first ball is a strike β the frame ends after one ball, and its score is 10 plus the pins from your next two throws. If it takes both balls to clear all 10 pins, that's a spare, scored as 10 plus the pins from your very next throw. Anything else is an open frame, scored simply as the sum of both throws. Because strikes and spares borrow pins from throws in the following frame(s), a frame's final score often can't be locked in until later frames are bowled.