How to log
The board shows what is left, not what you have scored. Throw sixty in a turn and enter sixty; the remainder drops on its own. A bust turn is entered as zero, because by the rules it does not count.
Start from 301, 501 or 701, with any number of players — heads-up practice or a whole group taking turns.
Common questions
Does it enforce double out?
Not automatically. Reaching zero ends it, and you enforce double out yourselves — enter a failed attempt as a bust of zero.