The basic standing pose of right photo shows a standardly good pose. This pose can be made only through hard and long training. First, you may wonder why you should try this unnatural pose in Taekwondo. But this pose can be used right away in Kyorugi.(Left photo)

You can see that even though he closed two feet he opend his two knees so that his left knee faces his front side.

If not, you cannot resist a sudden impact on your front knee.

The basic kyorugi pose will be explained again later.

Let me explain briefly why you should keep such a low standing pose. Look at the right mobile image. This image shows how you can fell your opponent down with ease. Convercely it also means that you can be felled down easily by your opponent. If you observe this image, the attacker moves down, under his opponent's centroid. Only when he is lower than his opponent's centroid it can be easy to lift him up.

So if you drop your center low enough(like the basic standing pose) your opponent cannot move under your centroid. So he cannot lift you up with ease, and you can resist him for a moment, when you hit him with your punch or with crash.