What does it mean when a player is vulnerable when playing bridge?

When you have scored a game, you are half-way to winning rubber and you become “vulnerable”. This means that when you fail in a contract, your opponents win 100 for each trick to go down by. When bidding vulnerable, you should be more cautious if you are bidding to spoil, expecting to fail.

When should you double for penalty in bridge?

Penalty Doubles – Examples. A player may decide to double a contract if they suspect that the contract will be defeated. This may be based upon the player's hand alone, or (more often) on the earlier bidding. We have two certain tricks in trumps.

What does it mean when you double in bridge?

Double (X) is the most versatile and flexible bid in bridge. It's used more and more these days at all levels. When the opponents have started the bidding (making the auction competitive), double gives you a new bid. The opposite is a penalty double, meaning “don't bid!”