-For animation, moves should contains "moving" and "fading" maybe...
-(But it's really just for Magnetic chess)
-setInterval "CRON" task in sockets.js to check connected clients
-(every 1hour maybe, or more)
-Systematically show init+dest squares in PGN, maybe after short notation
-(2 moves list, second for de-ambiguification)
-Crazyhouse: keep track of promoted pawns.
+Full detection of repeated positions (including turn)
+Debug HalfChess
+Implement UltimaChess