Crib and pegging scoring guide
The crib flush exception
Fifteens, pairs, runs and nobs count the same way in a hand and crib. A four-card flush counts only in the hand; a crib flush needs the cut to match too.
3♥ 7♥ 9♥ K♥ + A♣ cut: 4 points · 3♥ 7♥ 9♥ K♥ + A♣ cut: 0 points (crib)
Pegging
Track the cards in play order since the count last reset. Reaching 15 or 31 scores two. A trailing pair scores two; three equal ranks score six; four score twelve. A run scores its length, regardless of play order, but must use consecutive most-recent cards.
Playing 6, 4, then 5 makes fifteen and a three-card run: five points for that last card. Playing 7, 8, 9 then 6 makes a four-card run at a count of 30.
After a go, play any legal remaining cards up to 31. The last card earns one unless it made 31, which already earns two. There is no pegging flush or nobs bonus.
Rules reference: Pagat six-card cribbage and the American Cribbage Congress rulebook. Every example here is evaluated by the same calculator used for the result pages.