Virabradrasana II or Warrior II is a strong standing pose that helps build stamina and will power while aligning the spine.
Mr. Iyengar wrote that this pose can help relieves stiffness in the shoulders and back, tones up the ankles and knees and cures stiffness of the neck.
I started with some photos of the pose showing the variations first.
Below that is a video of a pose.
Start in Tadasana (mountain pose).
Then place the back (left) foot at the wall to give support to the back leg.
Step the front leg out about 4 feet from the back foot.
Raise the arms parallel to the floor, left hand at the wall for support and to gently push into to release the shoulders down the back.
Then step the right leg through the chair.
Turn the right leg out 90 degrees as did in pose above.
Bend the right knee to 90 degrees. Use the back rest of the chair to keep the upper body lifting up.
The chair seat supports the right buttock.
Press firmly into the back foot, keep the leg straight by tightening the knee.
Raise the arms parallel to the floor. Turn the head to look over the front hand.