I asked astra to make playable 4D chess

The game adds a fourth coordinate W, forming two identical 4×4×2 layers that serve as inner and outer cubes; moving only along W transfers a piece between corresponding squares. Bishops and queens may move at most one step in Z or W, rooks can attack across W, and a king can be captured by a one-step W move that cannot be blocked. Castling, en passant, and double pawn pushes are omitted. Draws occur on stalemate, three-fold repetition, a 100-move idle period, or when only kings remain.