Ten-Pin Bowling Rules — How to Play and Keep Score
Bowling is the classic case of a game nobody can score in their head, because a frame's value depends on balls that have not been thrown yet. A strike in frame three cannot be totalled until two more balls have landed, which is why paper scorecards are covered in half-finished sums. The app should hold each ball, show the frames it can already close, and leave the rest pending.
Score a game of Ten-Pin Bowling →
Overview
Bowling is the classic case of a game nobody can score in their head, because a frame's value depends on balls that have not been thrown yet. A strike in frame three cannot be totalled until two more balls have landed, which is why paper scorecards are covered in half-finished sums. The app should hold each ball, show the frames it can already close, and leave the rest pending.
Setup
Ten frames per player, bowled in rotation. Enter each ball as it happens. A frame's cell shows a slash for a spare and a cross for a strike, and the running total under the frame only appears once it can be worked out.
How to play
You get two balls per frame to clear ten pins. Knock them all down with the first ball and the frame ends there. The tenth frame is different: a strike or a spare there earns a third ball so the bonus can be collected on the same lane.
Scoring
An open frame scores the pins felled by its two balls, so 7 then 2 scores 9.
A spare, meaning all ten pins down using both balls, scores 10 plus the pins from the next single ball. A spare in frame 4 followed by a 7 in frame 5 scores 17 for frame 4.
A strike scores 10 plus the pins from the next two balls, regardless of which frames they fall in. Three strikes in a row therefore score 30 for the first of them. Two strikes then a 5 scores 25 for the first frame.
In the tenth frame, a strike earns two extra balls and a spare earns one. The tenth frame simply totals its balls: 10 plus 10 plus 10 scores 30, and 8 plus 2 plus 9 scores 19. The pin count resets after any ball that clears the rack, so the second and third balls can each be worth up to ten.
The best possible game is 300, from twelve consecutive strikes. Handicap pins, if used, are added once to the final total.
Under three-ball duckpin rules a strike and a spare score as above, but clearing the rack using all three balls scores a flat 10 with no bonus.
Ending the game
The game ends after the last frame of the last player. Highest total including handicap wins, and across a series the game totals are simply added together.
Common variations
No-tap, where nine pins counts as a strike, is popular at parties. League play usually calculates handicap as a percentage of the difference between a fixed basis score and the player's average, commonly 90 percent of the gap up to 220.
Scoring at a glance
| Who wins | Highest score |
|---|---|
| Score sheet | Fixed categories, each filled once, with bonuses |
| Typical round score | 0 – 10 |
| Negative scores | Never — scores only go up |
| Worth knowing | Every cell is a ball, not a frame. Enter pins felled by that ball only. Frame totals are always derived and several frames stay blank until later balls land. |
Ten-Pin Bowling — score sheet
Worked example
Settings: default. One player, a complete game. This is the classic worked scorecard, chosen because the lookahead bonuses are what implementations get wrong.
| Frame | Balls | Frame value | Running |
|---|---|---|---|
| 1 | X (strike) | 10 + 7 + 3 = 20 | 20 |
| 2 | 7, 3 (spare) | 10 + 9 = 19 | 39 |
| 3 | 9, 0 | 9 | 48 |
| 4 | X | 10 + 0 + 8 = 18 | 66 |
| 5 | 0, 8 | 8 | 74 |
| 6 | 8, 2 (spare) | 10 + 10 = 20 | 94 |
| 7 | X | 10 + 10 + 9 = 29 | 123 |
| 8 | X | 10 + 9 + 1 = 20 | 143 |
| 9 | 9, 1 (spare) | 10 + 10 = 20 | 163 |
| 10 | X, X, X | 30 | 193 |
Expected standings: single player, total 193, rank 1. finished: true — the
tenth frame is complete with all three balls thrown.
What this catches:
A frame's value is not known when the frame is thrown. Frame 1 cannot be scored
until two more balls have landed; frame 7 needs frames 8 and 9. The scorer must
compute forward from the ball log, never accumulate a per-frame number as it is
entered. This is the reason the game is scorecard rather than rounds: the cells
are balls, and the frame totals are derived.
Consecutive strikes chain. Frame 7 scores 29 because the next two balls are the strike in frame 8 and the first ball of frame 9. Getting this wrong usually produces a total in the 170s that looks entirely plausible.
The tenth frame takes three balls and its bonuses do not extend past it. Three strikes in the tenth score a flat 30 — there is no eleventh frame to borrow from.
A perfect game is 300 and an all-spare-with-five game is 150. Both are worth asserting as extra test cases: twelve strikes → 300; ten frames of 5,5 plus a final 5 → 150. If either is off, the bonus lookahead is wrong.
House rules and settings
Every table plays Ten-Pin Bowling a little differently. These are the 6 rules groups argue about. Each one is a setting in the app — and changing it recalculates a match that is already in progress, which is the thing no other score keeper does.
Frames per game: what is the default in Ten-Pin Bowling?
How many frames make a game. Ten is standard. Lower it for a quick game on one lane with a queue behind you.
Default: 10. Adjustable from 1 to 12 in steps of 1.
In the app: “Frames per game”.
Games in the series: what is the default in Ten-Pin Bowling?
How many complete games are added together for the final result. Three is the usual league series.
Default: 1. Adjustable from 1 to 6 in steps of 1.
In the app: “Games in the series”.
Balls per frame: what are the options in Ten-Pin Bowling?
Duckpin and candlepin lanes give three balls per frame. Clearing all ten pins with the third ball scores a flat ten with no bonus.
Default: Two - ten-pin. Two options:
In the app: “Balls per frame”.
Use handicaps: on or off in Ten-Pin Bowling?
Adds a fixed number of pins to each player's total so that beginners can compete with regulars. Each player's handicap is entered on their own row.
Default: off.
In the app: “Use handicaps”.
Show team totals: on or off in Ten-Pin Bowling?
Groups players into two sides and adds their scores together, for a doubles or team match.
Default: off.
In the app: “Show team totals”.
Count strikes, spares and splits: on or off in Ten-Pin Bowling?
Keeps a tally of how many strikes, spares and splits each player had, shown alongside the final score.
Default: off.
In the app: “Count strikes, spares and splits”.
Variants of Ten-Pin Bowling
Duckpin
Smaller pins and three balls per frame. Clearing the rack on the third ball scores ten with no bonus.
No-tap
Knocking down nine pins on the first ball counts as a strike, which flatters everyone's average.
Scotch doubles
Two players share one ball each in alternation through a single scorecard.
Ten-Pin Bowling is also known as
Bowling, Tenpins. These are the same game — the rules and the score sheet above apply to all of them.
Keep score offline
The sheet above works in your browser. Cardzo for iPhone remembers your players, survives a closed tab, and works in a field with no signal.
Coming to the App Store.