YOu guys missed an important point.

In that game 13-5 (actually 12-20 since it was black) not only grabbed the important 5-point, but also put a checker on the bar. Without that the play 13-9, 24-20 is also not too bad, though the 5-point is the most important one to grab early.

6-5 is always a run, there is not even a close second to consider.