What is a Vienna coup in Bridge?

In Bridge, a Vienna Coup refers to a specific sequence of plays aimed at achieving a surprise ruff or trumping an opponent's key card. It involves a deceptive play executed by the declarer to gain a significant advantage during the game.

Here's how a Vienna Coup works:

1. Preemptive Trump Play: The declarer leads a trump suit early, preferably one that the opponents are known to be void or weak in. This move attempts to force out any possible trump cards held by the defenders and create a shortage.

2. Controlled Ruff: After playing the initial trump, the declarer then plays a high card from another suit. When one of the defenders plays a higher card from the same suit, the declarer ruffs the trick with the remaining low trump.

3. Key Card Elimination: By trumping the defender's high card, the declarer effectively removes a crucial card from the opponent's hand. This elimination diminishes the defensive strength of the opponents and sets up the opportunity for further plays.

4. Gaining the Lead: The declarer regains the lead after ruffing and can continue with trump plays or switch to another suit, taking advantage of the weakened defensive position.

The Vienna Coup is a clever technique that combines misdirection and controlled ruffing to gain a tactical advantage in Bridge. It requires precise timing and an understanding of the opponents' holdings and vulnerabilities. However, when executed successfully, it can turn the course of a game and lead to significant rewards for the declarer.