Ron’s decade with the new Ministry of Magic’s Auror program is characterized by protecting Harry, whining about the leadership, and revolutionizing the strategy department.
At first, he doesn’t realize quite what he’s doing when he directs a team into a situation, ordering his team with confident ease, sending people in different directions according to their positions and expertise.
When Hermione points out that he’s using his friends and coworkers as wizard chess pieces - and winning nearly every time - he takes the opportunity to sit down with Dedalus Diggle, the current head of Operations and Tactics within the department. Together, they develop a new program to train Aurors, young and old, to see situations like a chessboard, and think three steps ahead like Ron is used to.
Their capture rates skyrocket, the death rate for the next class of Aurors drops enough to attract a wider variety of prospective Dark Wizard Catchers, and Ron becomes something of a strategy legend.