Brozel

Read main articles: Contract bridge, Bidding system, Bridge convention and Glossary of contract bridge terms

Brozel is a contract bridge bidding convention used to intervene after an opposing one notrump (1NT) opening bid. It features the following calls:

• Double - shows any single suit; advancer bids 2♣, after which intervenor corrects to his actual suit (or passes with clubs). This was originally played as requiring either a solid suit or a very good suit and an entry, leaving advancer the opportunity to pass with a couple of side-suit stoppers, though many partnerships now allow a weaker suit.
• 2♣ - shows clubs and hearts
• 2♦ - shows diamonds and hearts
• 2♥ - shows hearts and spades
• 2♠ - shows spades and an unspecified minor suit
• 2NT - shows clubs and diamonds

The convention is named loosely after its creator, Bernard Zeller.

Read more:

• List of defenses to 1NT