Fudo Dachi (immovable stance). This is one of the more advanced Shotokan stances that is practiced in Shotokan Karate dojo.
Start in Zenkutsu Dachi, and let the back knee bend while pushing it back so it is closer to being over the rear ankle. The front knee will cave in slightly to allow this to happen. Weight distribution is 50/50.
Fudo-dachi position.
View on the posture of fudo-dachi. This is a karate posture with a weight distribution 50% 50% similar to zenkutsu-dachi, the newer version looks differently more forward and significantly reduced.
Top view for fudo-dachi posture.
Distribution of gravitational forces in fudo-dachi.
Putting feet in fudo-dachi in an exercise on stumps.