When playing first, chooses the lowest card in hand. When playing 2nd or 3rd, plays the highest card that will not take the trick, otherwise, plays the lowest card of suit. When playing last, if there are points in the trick, plays the highest card that will not take the trick or if it must take the trick, plays the highest card of suit (avoiding the Queen of Spades). If playing last and there are no points in the trick, plays the highest card in hand. When the player is void in the lead suit, it will play its highest valued cards starting with QS, AS, AH, AD, AC, KS, KH, KD, KC, QH, QD, QC, etc.... For all three difficulty levels the cards are dealt completely at random to both you and to the computer players. Computer players are not given any special advantage and they do not know what cards are in your hand or in any other players' hands.. You cannot lead a trick with hearts, until hearts has been broken (played on another suit). So if it is your turn to lead and no heart has been played yet then you may not select a heart as the card to play first. In some variations of the game you can't play the queen of spades until hearts has been broken as well, but in this version you can always play the queen of spades and she doesn't break hearts..