IDAK: Instant Destroyer and Killer

Used When the opponents opening a strong, artificial Club on the one level.

• If the defense has a long suit, the defense will bid the suit immediately below that suit at the given Level deemed appropriate. In this case, bidding NT would show the Club suit although the opening was 1. This should not be understood as a transfer bid, since the responder can pass this bid of the suit with a long suit of his own in that suit bid. In the case that the defense is two-suited, then the principle is to transfer first and then rebid the second suit. This transfer is communicated with the second bid.
• 1 shows a definite pattern of 4-3-3-3 or a long Spade suit. Responder first assumes that it shows a definite pattern of 4-3-3-3 and bids his best suit. The partner then can show his long Spade suit by rebidding Spades at the level of the auction.
• A jump in spades by one level shows both Minors. Partner can bid their better minor or can bid NT to discover which Minor suit is preferable.

A double shows any 3-suited hand. Following are possible responses:

• With a one-suited holding, the responder bids 2 suits lower than his real suit. For example, a response of 1, after his partner's double of 1, shows a one-suited holding in Diamonds. The doubler now has the option of bidding the indicated suit with support, in this case, Diamonds, or passes the 1 response owing to good values in Spades. A jump by the responder is a matter of partnership agreement as to whether it shows increased values and/or strength.
• With both Major suits and an interest in preempting, then the responder will respond with 2NT, forcing the auction to the three level, knowing also that the doubler has support in at least one of the Major suits.
• With both Minor suits and an interest in preempting, then the responder will respond with 3NT or higher, forcing the auction to the four level, knowing also that the doubler has support in at least one of the Minor suits.
• With a constructive holding with 9 plus high card points and a two-suited holding, the responder will bid 1NT. The doubler will now proceed to bid up the line if there is no interference. Without interference, the normal bidding sequence can proceed without hindrance. If there is interference, then the doubler should double again to show shortness in the bid suit by the opponents. If the doubler has, however, moderate to excellent values in the suit bid by the opponents, then the double must pass to communicate this information to his partner, who still has the opportunity to bid.
• With a two-suited holding containing Spades and Diamonds, then the responder will jump in either suit, which promises the second suit. If the responder has a specific two-suited holding with Hearts and Clubs, then the responder will jump in either suit, which promises the second suit. It is a matter of partnership agreement as to whether, in this case, bidding the lower-ranking suit first shows weaker values and bidding the higher-ranking suit first promises stronger values.