10 plus the amount of pins on the next shot. If all ten pins are felled by rolling all three balls in a box, the result is a ten-box, marked by an X (as in the Roman numeral for ten) but no additional points are awarded. (In tenpin bowling, a strike is often scored with an X). Despite it never having been achieved as yet, the maximum possible score in a single game/string of candlepins 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, as it is the other major form of bowling that uses three balls per frame. Scoring sheet The candlepin scoring sheet is different from either tenpins or duckpins, in that it is usually oriented vertically, with two columns of squares in a two-square-wide, ten-square-tall arrangement to score one string for one player. The left-hand column is used to detail the "per-box" score, with the cumulative total being recorded down the sheet as each box is rolled in the right-hand column of squares, in a top-down order from the first box to the tenth. Spares and strikes are also marked uniquely in candlepins. Spares are recorded in a box by coloring in the left upper corner of the appropriate left-hand square (using a triangular shape to "fill-in the corner"). If a strike is recorded, opposing corners of the left-hand square are similarly colored in, while leaving sufficient space between the "filled-in" opposing corners, to record the score from the two succeeding balls' "fill" total for the strike. A common (albeit unofficial) practice is to mark a strike on a strike's bonus ball (double strike) by shading in the remaining two corners of the first strike. Calculating scores Correct calculation of bonus points can be a bit tricky, especially when combinations of strikes and spares come in successive boxes. In modern times, however, this has been overcome with automated scoring systems. When a scoring system is "automated", the bowler only has to bowl. It keeps score and will reset the pinsetter after three balls are thrown or all 10 pins have been knocked down.