The cards keep their usual ranks except for the ace which can be either the highest or lowest ranked card in a suit at the whim of the person playing it. The Joker is either the highest or lowest card in the pack again at the whim of the person playing the card. When the joker is played it must be given a suit. Regardless of the suit a joker played 'high' will defeat any diamond. But a joker lead and played 'low' will only lose the trick if another card from the suit the joker was played for or a diamond is played.
Diamonds are always trumps.
A diamond will always beat a card from another suit. Deal Deal, bidding and play proceed clockwise. The first dealer is chosen at random, and the turn to deal rotates clockwise after each hand. The cards are shuffled and cut and the dealer deals 10 cards to each player and three face down in the middle of the table to form the kitty. The bidding begins with the player to dealer's left and continues clockwise.