The Vienna System used the Bamberger point count to evaluate bridge hands: A=7, K=5, Q=3, J=1.[4] That method has been generally supplanted by the Work count (HCP) (A=4, K=3, Q=2, J=1).
The characteristic features of the Vienna System were not in its methods of hand evaluation, but in its bidding structure:
1♣ - minimum opener (up to about 17 HCP in modern terms), no 5-card suit except perhaps ♣. Forcing: responder is not allowed to pass. Responder's possible bids include:
1NoTrump - no fit for opener's suit; encouraging but not forcing
1NoTrump - maximum opener (at least about 18 HCP in modern terms), undefined hand, forcing; responder may not pass. Responder's possible bids include:
2♣ - a bad hand
2♦♥♠3♣ - 5-card suit, game-forcing
2NoTrump - no 5-card suit, game-forcing
Austrian teams captained by Stern, playing the Vienna System, won the European championships (Open category) in 1936 and 1937, and defeated Ely Culbertson's American team in a challenge match in 1937 (see: Bermuda Bowl#Predecessors).
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