-Impossible to play / triple move in Doublemove : turn issues, maybe because a move is sent twice to the server...
-=> solution = sign (hash?) moves, and if an already received signature received again, ignore?
+Chakart egg : afficher image du bonus sur la case d'arrivée, clignotante, pendant 1 seconde ?
+Invisible queen : afficher "??" sur la case de départ jusqu'au coup adverse (qui l'efface du coup) ?