A player with no card of the led suit may play a trump.
The other players must play a card of the same suit if possible.
The trick is taken by the highest card of the suit led.
Any player who has no card of the suit led must play a trump if they can.
The trick is won with the highest card of the suit led.
If the partner does win the trick, he is supposed to play any card of the same suit.
Three or more cards of the same suit: 1 per card.
A hand containing a flush, or six cards of the same suit.
To play a card of the same suit as the one that was first led to the trick.
I don't got no two cards of the same suit.