Bridge World Standard Defense 2001 is a set of defensive-carding agreements based on the methods most popular among American experts. It is used as a format, style, and partnership agreement for defensive card-play. The advantage of a Standard Defense is that it permits both partners, who are acquainted with the format, to readily conform to the standards of the agreement without much prior discussion. This interprets into a situation where both partners readily understand the leads, signals, and discards of the other player.
The Bridge World Standard Defense agreement is not complicated and conforms to most standard partnership agreements with very few deviations. Source.
I. Opening Leads A. Against Suit Contracts 1. Honor Leads King from Ace-King;
otherwise, top from a sequence;
highest equal from an interior sequence2. Spot-Card Leads third highest from even length;
lowest from odd length3. Alarm-Clock Leads (to suggest an unusual situation, such as a ruff possibility) fourth highest from five or six cards;
fifth highest from seven cardsB. Against No Trump Contracts 1. Honor Leads Ace requests unblock or count signal;
Queen requests Jack;
highest equal from non-Ace sequences and interior sequences2. Spot-Card Leads fourth highest;
second highest from weak suitsII. Later Leads A. Against Suit Contracts 1. Honor Leads King from Ace-King;
otherwise, highest equal from sequences and interior sequences2. Spot-Card Leads in opening leader's suit high from remaining doubleton;
low from remaining tripleton3. Spot-Card Leads in a new suit third highest from even length;
lowest from odd lengthB. Against No Trump Contracts 1. Honor Leads highest equal from sequences and interior sequences 2. Spot-Card Leads in opening leader's suit original fourth highest 3. Spot-card Leads in a new suit attitude III. Signaling Techniques or how to send messages A. Attitude Signals low discourages;
high encouragesB. Count Signals high even;
low oddException: in the trump suit, upside-down count C. What a Count Signal shows present count D) Suit-Preference Signals high prefers higher suit;
low prefers lower suitIV. Signal Meanings or when to send which message A. When following to partner's lead attitude B. When following to declarer's or dummy's lead count C. When Playing Trumps count D. When Discarding In general: from sequences and interior sequences with significant trick-taking ability, highest equal First Discard in a particular suit attitude Second Discard in a particular suit count Discard relating to a different suit suit-preference E. When splitting honors as second hand King from Ace-King;
otherwise highest equalF. Throughout the Defense 1. Special situations where count takes precedence at trick one against a suit slam, after a King-lead 2: In general: unusual play shows unusual holding or requests unusual play
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.
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