What about scoring holes?

Scoring holes are a separate set of optional holes provided to keep track of the number of games won.  They are useful if you have a habit of playing “first to 5 games” or such although many players simply keep a mental count.

From a design perspective, sometimes they fit well but often make for a more confusing and clumsy design.

Below is a two-track continuous folding board with 5 scoring holes on the left-hand edge.