Jacks or Better In the case of a Royal Flush, Straight, Poker or Full House, you must keep your hand. If you have four cards leading to a Royal Flush, switch one card to get the one you want. If you have four cards leading to a Straight Flush, replace the one that is of no use to you. If you have a three of a kind, switch the remaining cards. If you have double pairs, discard the last card. If you have a pair or two high cards of King, Queen, Jack or Ace, discard the remaining cards. Deuces …