title 4. Do move

actor Player A
participant Solid Chess [A]
database POD A
database POD B
participant Solid Chess [B]

autonumber

Player A ->Solid Chess [A]: do move
Solid Chess [A] -> POD A: PATCH: move
Solid Chess [A] ->POD B: POST: "new move" (RDF) to inbox

Solid Chess [B]->POD B: GET: inbox
POD B-->>Solid Chess [B]: RDF

loop all notifications
	opt new move
    	Solid Chess [B]->POD A: GET: move
        POD A-->>Solid Chess [B]: RDF
        note over Solid Chess [B]: update chessboard (GUI)
    end
end