The second Naihanchi keeps the sideways horse-stance walk and changes the upper body. Many versions add a higher kick or a different chamber. Learn it as a variation on the first, not as a brand-new floor plan.
Steps
One common Moo Duk Kwan reading, counted from the first technique. Ready stance comes before step 1. If your instructor splits or joins a count, use theirs. Same sideways line as Cho Dan. The new work is in the arms and the kick.
1Look right. Cross-step, hands pressing down, then step out to horse stance.
2The strike sits higher than in Cho Dan. Many schools use a rising block or an augmented high block instead of the low side block.
3Cross back the other way. Inside-outside block to the front, horse stance.
4Kick without standing all the way up. The support knee stays bent, and the kicking foot returns to the same horse-stance width.
5Hammerfist or elbow across the body, then the inward foot sweeps that close the stance.
6Repeat the phrase back toward the start.
7Return to the Naihanchi ready posture.
What to watch for
Repeating a difficult stance until it is quiet
Kicking without standing all the way up
Seeing the difference of one arm motion inside a familiar step
YouTube examples
Performances differ by organization. Use them to remember the shape, then match your instructor’s version.