Has an AFL game ever ended 171-112?
Exactly once. On August 27, 1977, Richmond beat St Kilda 171-112, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 171-112 in league history.
That makes 171-112 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 172-112 has happened never and 171-113 has happened never.