The 49ers' win over the Miami Dolphins on Sunday at Levi's Stadium was special in more ways than one for San Francisco star Brock Purdy.

In a game that delivered exactly what most expected, the 49ers clicked in all facets and the Dolphins' growing pains look painfully real.

Quarterback is the hardest position to play in all of professional sports — a black box of inscrutability that even billion-dollar organizations with endless resources can’t quite crack. Even the Niners, led by a brilliant, offensive-minded head coach, have logged as many misses as hits at the position during Kyle Shanahan’s tenure in Santa Clara.