/**
  * Starts a game against a human player
  *
  * @param aUser
  * @return id of the created game
  */
 public synchronized int startGameAgainstHumanPlayer(User aUser) {
   int tempId = this.calcNumberOfGames();
   Game tempGame = this.createGame(tempId, aUser.getName(), aUser.getPwd());
   tempGame.setWhitePlayer(aUser);
   tempGame.setState(WAITING_FOR_OTHER_PLAYER);
   this.addGame(tempGame);
   return tempId;
 }
  /**
   * starts a game agains a bot
   *
   * @param aUser
   * @return id of the game that is started
   */
  public synchronized int startGameAgainstBot(User aUser) {
    int tempId = this.calcNumberOfGames();
    Game tempGame = this.createGame(tempId, aUser.getName(), aUser.getPwd());
    tempGame.setWhitePlayer(aUser);
    Bot tempBot = new Bot();
    tempGame.setBlackPlayer(tempBot);
    tempGame.setState(STARTED);
    this.addGame(tempGame);

    return tempId;
  }