ACBL Defense Database
This database contains approved defenses to methods permitted under the ACBL Mid-Chart. When playing in an event governed by the ACBL Mid-Chart, you may refer, during the bidding and/or play, to any defense contained herein to a Mid-Chart method being used by your opponents (you may also refer to your own defensive method).
If you choose to play a method permitted by the Mid-Chart, you are required to:
- Pre-Alert the method prior to the start of the auction on the first board.
- Have a complete written description of the method available for your opponents.
- Except for those methods on the Mid-Chart designated by an asterisk (*), have a copy of an approved defense from this database available for your opponents should they wish to use it. If there is no approved defense for the method you wish to play, you may not use that method until such time as you have submitted a defense to ACBL and that defense has been approved (except for those methods designated by an asterisk (*) on the Mid-Chart, which do not require a suggested defense).
The intent of these requirements is to permit responsible pairs a reasonable amount of freedom to determine the methods they wish to play while insuring that no advantage is gained from a method that is unknown and/or whose submitted defense is inadequate.
Convention and Defense Approval
Approval Committee Members: Chip Martel, Jeff Meckstroth, Steve Weinstein
This sub-committee is also responsible for approving experimental methods to be added to the ACBL Mid-Chart and for approving defenses to Mid-Chart methods to add to the ACBL Defense Database. (Click here to send a proposal to the committee for approval.)