The Compound Trump Squeeze is one of the oldest squeezes formulated by a Whist player called Mr. William Whitfield before the turn of the 20th century, that is before 1900. Mr. William Whitfield defined a Compound Trump Squeeze as a squeeze in which at least one opponent is subject to a trump squeeze. The following illustration should suffice to clarify his definition.
The situation is that South is the declarer. The trump suit is Spades. South is on lead. South needs all the remaining tricks to fulfil the contract.
9763 72 53
K5 J106 K98
Q763 Q3 J4
A1094 K8 A7
South leads a low Heart and trumps in dummy. A trump is lead from dummy, and East discovers that he must discard a Club or a Diamond to avoid allowing Declarer to establish an additional Heart trick by ruffing.
South then discards that suit which East discards. A Diamond for a Diamond, or a Club for a Club. Whichever suit East discards, South discards, and South then leads that suit from the dummy and wins in his hand. If East discards a Diamond, South then leads a Diamond from the dummy, and wins with the King of Diamonds in his hand. If East discards a Club, then South leads a Club from the dummy, and wins the trick with the Ace of Clubs.
South then leads the Ace of Hearts, discards a Diamond from dummy, and leads another small Heart, which South ruffs in dummy.
When South leads the last trump card from the dummy, it becomes obvious to East that he must keep his last Heart and discard whichever Minor suit he has kept. South discards his last Heart on the last trump card, and then West is compound trump-squeezed in both Minor suits.
If you wish to include this feature, or any other feature, of the game of bridge in your partnership agreement, then please make certain that the concept is understood by both partners. Be aware whether or not the feature is alertable or not and whether an announcement should or must be made. Check with the governing body and/or the bridge district and/or the bridge unit prior to the game to establish the guidelines applied. Please include the particular feature on your convention card in order that your opponents are also aware of this feature during the bidding process, since this information must be made known to them according to the Laws of Duplicate Contract Bridge. We do not always include the procedure regarding Alerts and/or Announcements, since these regulations are changed and revised during time by the governing body. It is our intention only to present the information as concisely and as accurately as possible.