Quantum Chess 2.1.0

The chess variants go online.

Added

• Online play for the two-player chess variants: 3D, 4D and 5D chess, Tri-Dimensional chess, Chess960, Atomic,
  Crazyhouse, Antichess, King of the Hill, Three-check, Horde, Hexagonal chess, Capablanca chess, Shogi, Xiangqi and
  Makruk. Choose Online as the opponent in a variant's New game dialog and invite someone or open a challenge. The
  server draws the dice of every move; both players' devices check every move against the rules, and if they ever
  disagree, the game is annulled.
• Four-player chess and Bughouse online: choose a player for every seat, or leave seats open for anyone to join,
  optionally with random seats. Each invited player answers on their own, and the game starts when every seat is taken.
  Resigning or running out of time ends the game for everyone (the other team wins, or the others share the win); a
  draw needs every player.
• Kriegspiel and Fog of war online, with the server as the umpire: it keeps the whole board, decides every move and
  sends each player only what they may see. In Kriegspiel a move the umpire refuses uses no turn and is not told to
  your opponent; in Fog of war you see the odds of a move before you confirm it. The whole board and every move are
  shown when the game ends. With this, all twenty chess variants can be played online.
• A rating for every two-player variant: rated variant games count in a rating of that variant, shown on the
  Statistics page with the leaderboard of each variant. Kriegspiel and Fog of war are rated by default; the other
  variants when you ask for it and your opponent accepts. Games of four are not rated.
• Rematches of variant games: the Rematch button after an online variant game; in a game of four every player
  moves on by one seat.

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All changes since v2.0.1: v2.0.1...v2.1.0 · Full changelog