Related Clues:

• Initial strategy
• Preferred option
• First option
• Less than three-dimensional
• Preferred way to proceed
• It's often backed up
• Two-dimensional scheme by backing artist
• Artist brought back to design flat
• Original scheme
• Preferred course
• Like Flatland
• Flat scheme with sharps in the middle
• Lying in a flat surface
• Flat resistance to principal strategy
• In two dimensions