p.boxed
  | A new piece can swap with any of your other pieces.

p.
  A new piece appears, starting in front of the pawns.
  It moves like an Amazon: Queen + Knight, but doesn't capture.
  Instead, it can swap its position with any piece except the king.

figure.diagram-container
  .diagram
    | fen:rnbqkbnr/pppppppp/3j4/8/8/3J4/PPPPPPPP/RNBQKBNR:
  figcaption Deterministic initial position.

p Pawns can promote into a Joker if you have none on the board.

h3 Source

p
  | This variant is inspired by 
  a(href="https://www.reddit.com/r/TotemChess/comments/imi3v7/totem_rules/")
    | Totem Chess
  | , which seemed a bit too complicated.