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Unblocking technique in contract bridge From Wikipedia, the free encyclopedia
The Vienna coup is an unblocking technique in contract bridge made in preparation for a squeeze play.[1] It is so named because it was originally published by James Clay (1804-1873) after observing it being executed in the days of whist by "the greatest player in Vienna" — identity unknown.[2]
♠ | A J | Example 1 South to lead | |
♥ | A | ||
♦ | — | ||
♣ | 2 | ||
N |
♠ | K Q | |
♥ | K 4 | ||
♦ | — | ||
♣ | — | ||
♠ | 4 | ||
♥ | Q 2 | ||
♦ | — | ||
♣ | A |
On the play of the ♣A by South, East is squeezed but can escape by throwing a small heart. Although the ♥Q is now set up, South must next play either the ♥Q, ♥2 or ♠4 to be won in dummy and has no entry back to cash it; he must now lose a spade to East.
♠ | A J | Example 2 North to lead | |
♥ | — | ||
♦ | — | ||
♣ | 2 | ||
N |
♠ | K Q | |
♥ | K | ||
♦ | — | ||
♣ | — | ||
♠ | 4 | ||
♥ | Q | ||
♦ | — | ||
♣ | A |
However, if instead, South plays the ♥2 to the ♥A, East is squeezed when declarer next leads the ♣2 to the ace.
|
♠ | A J | Example 3 South to lead | |
♥ | — | ||
♦ | 2 | ||
♣ | — | ||
N |
♠ | K Q | |
♥ | K | ||
♦ | — | ||
♣ | — | ||
♠ | 4 | ||
♥ | Q | ||
♦ | — | ||
♣ | A |
In this layout there is no way to get back to the hand by playing the ♣2 to the ace. In this case, the ♥A must have been cashed already at an earlier stage to squeeze East when declarer leads the ♣A and discards the ♦2 from the table.
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