TODO

   1 # Functionality:
   2 On Game page "mconnect" events =>
   3   send lastate to them (because they have the game infos) or just "your turn" - if their turn
   4   remember them to send next "newmove" (or just "it's your turn") later - if not their turn
   5   (=> listen for "mdisconnect" as well)
   6 From MyGames page: send "mconnect" to all online players (me included: potential multi-tabs)
   7   When quit, send mdisconnect (relayed by server if no other MyGames tab).
   8 And remove current "notify through newmove" on server in sockets.js
   9
  10 Analyse mode when launched from a position: should keep orientation
  11 --> $route query param, "side=w or b"
  12
  13 Subcursor (intra move) for multi-move variants for better navigation (in BaseGame)
  14
  15 Allow symmetric mode in all variants (vertical symmetry for racing kings)
  16 flag in challenge, "Symmetric: true / false", option of GenRandInitFen()
  17
  18 # Misc:
  19 Saw once a "double challenge" bug, one anonymous and a second one logged
  20 Both were asked a challenge probably, and both challenges added as different ones.
  21
  22 # New variants
  23 8-pieces https://www.youtube.com/watch?v=XZ8K02Da7Ps&list=PLRyjH8DPuzTBiym6lA0r84P8N0HnTtZyN&index=6&t=0s
  24 https://www.chessvariants.com/rules/8-piece-chess
  25 Eightpieces : non-symmetric
  26 Sym8pieces : symmetric (960)
  27
  28 Generator vatiant, called "Matrix" ?
  29 Peces on first rank never move but generate new pieces. Pawn don't generate.
  30 A generator captured and replaced by a similar piece does not generate.
  31 King does not generate. No castling. En passant possible?
  32 Goal is still checkmate.
  33
  34 Take(a)n(d)make : if capture a piece, take its power for the last of the turn and make a move like it.
  35 If a pawn taken: direction of the capturer.
  36
  37 + Maxima, Interweave, Roccoco, Dynamo, Synchrone, Cannibal (force captures)
  38
  39 S-chess https://en.wikipedia.org/wiki/Seirawan_chess