The saturated squeeze is a type of squeeze play

Squeeze play (bridge)

A squeeze play is a type of play late in the hand of contract bridge and other trick-taking game in which the play of a card forces an opponent to discard a card that gives up one or more tricks. The discarded card may be either a winner or a card needed to protect a winner...

 in the card game

Card game

A card game is any game using playing cards as the primary device with which the game is played, be they traditional or game-specific. Countless card games exist, including families of related games...

 of Bridge

Contract bridge

Contract bridge, usually known simply as bridge, is a trick-taking card game using a standard deck of 52 playing cards played by four players in two competing partnerships with partners sitting opposite each other around a small table...

.

The key feature of the saturated squeeze is that it involves threats in all four suits, and all four threats are necessary for the squeeze to function. Accordingly, saturated squeezes can only occur in notrump contracts, and they are always non-simultaneous, with each defender being squeezed in turn as one or more winners are cashed in a suit guarded by the other defender.

At least 20 positions exist, with different arrangements of menaces and entries. The following diagram demonstrates the simplest form of saturated squeeze:

		♠	-
		♥	-
		♦	AK9
		♣	A2
♠	A	N W         E S		♠	K
♥	A			♥	K
♦	QJ10			♦	-
♣	-			♣	QJ10
		♠	2
		♥	2
		♦	-
		♣	K93

Here West has the only diamond stopper, East has the only club stopper, and the major suits are protected by both defenders. When the ace of clubs is cashed, West must abandon one of the majors, and now cashing the top diamonds squeezes East between that major and clubs.


Here is an example of a more complex saturated squeeze ending:

		♠	2
		♥	-
		♦	AK9
		♣	A42
♠	A	N W         E S		♠	K
♥	Q108			♥	J97
♦	-			♦	QJ10
♣	QJ10			♣	-
		♠	-
		♥	AK2
		♦	2
		♣	K53

This time West has the club stopper, East has the diamond stopper, and once again the major suits are protected by both defenders. Declarer cashes the diamond ace, on which West cannot discard a club, and

(i) if West discards the spade, declarer continues with the diamond king (discarding a club from the South hand), forcing West to abandon hearts as well. Now declarer can cash either club winner to squeeze East in three suits.

(ii) if West discards a heart, and then discards another heart on the king of diamonds (again, South discards a club), declarer next cashes the king of clubs. East must retain the heart and diamond stoppers, so must discard a spade. Now cashing the top hearts squeezes West in the black suits.




Reference: Saturated Squeezes, Bridge World, August 2003, p. 4.