p.boxed
  | Pieces inherit the movement of friendly pieces observing them.

p
  | This variant is based on 
  a(href="https://www.chessvariants.com/rules/relay-chess") Relay Chess
  |  from chessvariants.com by Johnny Luken (2012).

p.
  As in Relay Chess, there is no castle or en passant captures, and pawns
  can only advance one square forward (by themselves).

p However, I made two substantial changes:
ul
  li.
    Being relayed by a friendly piece adds moving options, without canceling
    the base movements of a piece. Thus the relay is an "upgrade", explaining
    the chosen name "Relayup".
  li.
    Pawns relayed by any friendly piece (except pawns) gain the ability to
    move and capture like it, but by one step only.

figure.diagram-container
  .diagram
    | fen:rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR c3,d4,d3,e3,f4,f3,g3:
  figcaption.
    Movements of the e2 pawn, relayed by knight and queen (+ king and bishop).

p.
  Finally, since stalemate counts as a win and (I believe) no fully blocked
  positions can be reached, the goal is now to capture the enemy king.
  You can theoretically go or remain into check.