Black is once again forced to throw another warrior in the way – this time it’s f10 - k10.
The King can then charge across the board again, and capture the warrior on a10, with the following move:
k9 – a9 x
At little or no cost, white has taken two vital defenders away from black, and is still threatening a win on the next move.
The king doesn’t always get to rampage around quite as destructively as that, but it shows you the sort of thing that can happen, and illustrates another principle of hnefatafl: if there is an open rank or file, get your king on to it!