Richelieu's wide range of preliminary designs

What preliminary designs were considered for the Richelieu class?

The studies ranged from modest developments of Dunkerque to much more ambitious Richelieu designs.

Richelieu's preliminary studies covered a wide range of possibilities. At one end was a mildly updated version of the Dunkerque design. At the other was a much more powerful 'super Richelieu' concept. An almost clean-sheet design process allowed France to consider many alternatives.