From BlenderWiki
IK Solver Constraint
Mode: Pose modes
Panel: Constraints (Object context and sub-context, F7, or Editing context, F9)
Description
The IK Solver constraint panel.
The IK Solver constraint implements the inverse kinematics armature posing technique. Hence, it is only available for bones.
This constraint is fully documented in the inverse kinematics page of the rigging chapter.
