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Is it a split?

Tap the pins that are still standing after your first ball. The check uses the USBC definition, the same one Pinfall uses to count your splits.

Try it: tap the pins you would have left.

Still standing: 7-10

Split

Enter 7-10

Splits follow the USBC rule: headpin down and the standing pins in separate groups. The app uses the same check.

What counts as a split

A split is a leave after the first ball where the headpin is down and the standing pins form two or more separate groups, with pins down between them. The 7-10 is the classic one. Even two pins side by side are a split, like the 5-6, because the pin in front of and between them, the 3, is down.

Pins that touch diagonally (2-4, 5-8) or stand one behind the other with a row between them (2-8, 3-9) count as connected. The 2-8 is therefore no split, however tricky it looks.

Washouts

Same shape as a split, but with the headpin still standing, like the 1-2-10 or the 1-2-4-10. By the rules a washout is not a split, which is why score sheets do not mark it. Pinfall counts washouts separately, so they do not hide in your split numbers.

Leaves with a name

LeaveNameBy the rule
7-10BedpostsSplit
4-6-7-10Big fourSplit
4-6-7-9-10Greek churchSplit
2-7Baby splitSplit
3-10Baby splitSplit
5-7-10Sour appleSplit
2-4-5-8BucketNo split
2-8SleeperNo split
1-2-10WashoutWashout, no split

Questions

Is the 7-10 a split?

Yes. The headpin is down and the 7 and 10 stand in the two back corners with pins down between them. It is the best known split, often called the bedposts.

Is the 2-7 a split?

Yes. The 4 between them is down. It is called a baby split, and so is the 3-10.

Is a leave with the headpin standing a split?

No. With the headpin up it is a washout, even if the other pins stand far apart.