Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
Vulerability of a pair determines the scoring of a contract. A contract by a vulnerable pair usually scores higher, but also is penalised larger when it goes down. Vulnerability plays a major role in competitive auctions.
When a pair has made a game, they become vulnerable. Otherwise, they are non-vulnerable.
The vulnerability of each pair is pre-determined by the board number. NS is vulnerable in boards 2, 4, 5, 7, 10, 12, 13, 15 and repeats for each 16 boards. EW is vulnerable in boards 3, 4, 6, 7, 9, 10, 13, 16 and repeats for each 16 boards.