taketurn

 @Override
    protected void turnTaken(final FindTheNumberPlayer player,
                             final Integer              guess)
        throws InvalidTurnException
    {
        if(!(range.isInRange(guess)))
        {
            throw new InvalidTurnException("Number out of range");
        }
        
        if(guesses.contains(guess))
        {
            throw new InvalidTurnException("Number already guessed");
        }
        
        lastGuess = guess;
        lastPlayer = player;
        if (isOver()) {
            return;
        }
        if (guess > numberToGuess) {
            range = DefaultRange.create( range.getMin(), guess-1);
        }
        else {
            range = DefaultRange.create( Math.min(range.getMax(), guess+1), range.getMax());
        }
        
    }