Scoring
One point is scored for each pin that is knocked over. So, in a hypothetical game, if player 'A' felled 3 pins with their first ball, then 5 with their second, and 1 with the third, they would receive a total of 9 points for that box. If player 'B' knocks down 9 pins with their first shot, but misses with their second and third, they would also score 9.
In the event that all ten pins are felled by any one player in a single box, by no more than two throws (just as in tenpins) bonuses are awarded for a strike or spare. A strike is achieved with just the first delivery downing all ten pins, with a spare needing two throws, again just as in the tenpin sport. If all ten pins are felled by rolling all three balls in a box, the result is a ten-box, usually marked by an X (as in the Roman numeral for ten) but no additional points are awarded. (In ten-pin bowling, a strike is often scored with an "X").
The maximum score in a game is 300. This is scored by bowling 12 strikes: one in each box, and a strike with both bonus balls in the 10th box. In this way, each box will score 30 points (see above - scoring:strike).
This scoring system, except for the scoring sheet's appearance, and the graphic symbols used to record strikes, spares and 10-boxes, is identical to that of duckpins.
Read more about this topic: Candlepin Bowling