Hi,

I thought of one way to simplify the movements for Protected Chess. Queens, rooks and bishops move in the usual directions but only one square and knights only move in the forward directions if protected but can't jump the orthogonal space in front of the knight must be open. Unprotected knights can jump. Pawns remain the same except that a piece protected by a pawn has its usual powers; this will make pawns important in the game.

Unprotected pieces have their usual powers. Castling, for protected king and unprotected rook only, is allowed and so is en passant, for only unprotected pawns. Only unprotected pawns may jump two squares on the first move. Only unprotected pawns may promote.
There is a contradiction that occurs if two rooks/bishops protect each other in that protecting each other they would get the shorter move but would then actually be unprotected move. Perhaps pieces that mutually protect each other would move as protected pieces despite actually being unprotected.

Thoughts?

Scott/talen314