Brown sticker
From Wikipedia, the free encyclopedia
Brown sticker is a category of contract bridge conventional agreements defined by the World Bridge Federation (WBF).
Brown sticker conventions are considered to be difficult to defend against, and thus are only permitted at the highest levels of tournament play. Only Highly Unusual Methods (HUMs) have a higher classification.
The official definition can be found on the WBF website[1].
A short summary would be that a convention qualfies for a brown sticker if it fulfills any of the following criteria:
- It is an opening bid of 2♣ through 3♠ that may be weak and does not promise a specified suit
- It is an overcall of a natural opening bid of one of a suit that does not promise 4 cards in a known suit.
- It is a weak two-suited bid where one of the suits by definition may be only 3 cards or shorter.
- It is used for protection of psychic bids, or systemically required psyches.
Notable exceptions are the Multi 2 diamonds (due to its popularity), and cue bids on strong hands to force partner
The bottom line is, that if a bid is weak (or potentially weak having multiple options) and does not promise 4 cards in a defined suit (when weak) then it is likely to have a brown sticker.
