+Promotions: increase pieces sizes, better background.
+Code: use two spaces instead of tabs, everywhere.
+Increase code line length to 100 or more?
+(http://katafrakt.me/2017/09/16/80-characters-line-length-limit/)
+Chat button should be more apparent after game ends (color ?)
+Reinforce security for problems upload (how ?)
+
+The mode switch between human/computer/friend (+ problem) is a mess
+(example: finished computer game, ongoing friend game, reload, friend game is unreachable)
+
+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.
+
+style menu : surligner onglet courant
+
+Interface :
+ - newGame: une modalBox à paramètres, timeControl, type d'adversaire ==> "new Game")
+ - friend-->renommé en 'analyse' et devenant un vrai mode analyse (on garde ces trois modes ?)
+
+problèmes : récupérer 20 ou 50 depuis le serveur, puis les afficher un par un en les analysant directement,
+comme sur le site de ProgramFOX ==> présentation unifiée échiquier avec instructions dessus et soluce cachée dessous
+
+==> il faut pouvoir faire "new Interface(variables)" pour lancer une analyse de problème sans repasser par le mode jeu...
+
+Importer des parties : nécessite de parser le PGN produit (possible, un peu pénible)
+mais permettrait mode analyse (avec bouton "analyse", comme sur ancien site).
+
+espagnol : jugada ou movimiento ?
+fin de la partida au lieu de final de partida ?