You must not, when you have gained a victory, use any...

You must not, when you have gained a victory, use any triumphing or insulting expressions, nor show too much of the pleasure you feel; but endeavour to console your adversary, and make him less dissatisfied with himself by every kind and civil expression that may be used with truth; such as, you understand the game better than I, but you are a little inattentive, or, you play too fast; or, you had the best of the game, but something happened to divert your thoughts, and that turned it in my favour.