The origin of this conventional defense method is unknown. The Suction Redwood conventional defense method is employed against an immediate overcall of No Trump by the opponent on the one level.

The method outlined below has been given the designation Suction Redwood. It is an extended variation of the concept used in Redwood, which is itself a variation of Kickback. Redwood is a method of continuing the auction if an immediate fit has been found in either of the Minor suits.

Concept

Once interference has occurred with an immediate overcall of No Trump, the responder has then the opportunity to describe the holding further with the following bids as shown in the schematic:

Double:	A double is for penalty. The double promises 15 plus high card points. Partner must pass.
2 :	Shows Diamonds, or Spades and Hearts.
2 :	Shows Hearts, or Spades and Clubs (both black suits).
2 :	Shows Spades, or Clubs and Diamonds, both Minor suits.
2 :	Shows Clubs, or Diamonds and Hearts (both red suits).
2 NT:	Shows pointed suits (Diamonds and Spades), or rounded suits (Clubs and Hearts).

The use of the double gives the responder an added feature to show points instead of only distribution. An example follows, which should clarify this difference:

Opener		Intervenor		Responder		Advancer		Meaning
1								Promises an opening bid with sufficient values.
		1 NT						The range of the No Trump overcall should be announced.
				2 NT		Pass		This response shows either both pointed suits (Diamonds and Spades, or both rounded suits (Clubs and Hearts).
				KQ874 6 AK965 82
3		Pass						The opener relays to ask which two suits - pointed suits or rounded suits.
				3				The intervenor always bids the lower-ranking suit first. The responder then knows that partner holds both pointed suits, Diamonds and Hearts. If the advancer has Diamond support, then the advancer is allowed to pass.

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.