The three Steps Deriving Double Squeeze of a U species of Compound Squeeze

1. First Step : Stripping the right threat suit
   After the play of the first squeeze card, the bilateral threat which has been discarded on the first squeeze card became the right threat of the Deriving Double Squeeze, the left threat of which will be the initial unilateral threat. The declarer must eliminate all the high cards of the right threat suit in both hands. Having been a bilateral threat, the right threat will always provide a way to give the lead to the hand facing the squeeze card The declarer will play all the high cards of this suit and return to the squeeze card hand in order to eliminate the remaining high cards of the right threat suit. Any threat suit may be used to give back the lead. With the cards on the left, and can be used
   At the end of this step, the lead must be in the bilateral threat hand with a lead tansferring line to the other hand in either the bilateral threat suit or the left threat suit still at his disposal.
   
2. Second Step : stripping the bilateral threat hand.
   All the other high cards of the hand besides those of the bilateral suit must be played. They may be played in any order. The last high card of the squeeze card suit must be played when the bilateral threat have the lead (and because the first step had already been completed,there is no more high card of the right threat suit in any hand}.
3. Third Step : Stripping the other hand.
   At the end of the second step, the hand facing the bilateral threat may have high cards in only two suits : either the bilateral threat suit or the left threat suit.
   Only one high card is needed if there is one samll card of the same suit in the bilateral threat hand. If there is more than one high card, any of those two suits may be used to transfer the lead. After the lead had been transferred, the high cards of this hand may be played in any order.