-Later:
-Let choice of time control, allow correspondance play, several games at the same time
-==> need to use indexedDB instead of localStorage. Maybe with Dexie https://dexie.org/
-Each user would have a unique identifier stored in the client DB.
-Allow to cancel games (if opponent doesn't connect again)
-Identity would be browser-based: different games on smartphone, home computer, work computer... (why not ?)
-Index might still look the same, and variant page would have another tab "Games"
-==> running, and finished (which can be deleted from local memory)
-(A true analysis mode could be implemented also, to navigate in completed games --> use a button)
-Allow challenging a specific player (by his chosen name)
-But keep the random pairings as main playing way + always playing in ZEN mode,
-except when accepting an individual challenge.
+Interesting:
+Monochrome Chess (Proprietary game,
+Looney Industries; Andrew Looney, 1996).
+Usual men and array but pieces are all of the
+same colour. A man is controlled by the player
+in whose half of the board it stands. Thus after
+e4-e5, the pawn changes sides and reverses
+direction. When you capture (by definition, in
+the opponent’s half) there can be no recapture
+as the piece has changed sides. You may not
+immediately reverse an opponent’s move. The
+king has no royal powers but can castle. The
+men are allocated points and the object is to
+have the most points (in pieces captured) when
+the game ends, which is usually when the
+players agree or when one half of the board is
+empty. Values: King=10, Queen=8, Rook=5,
+Bishop=4, Knight=3, Pawn=1. A related game
+Martian Chess is described in chapter 38.
+(Proprietor’s rule sheet, Variant Chess 39)