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A notrump structure is the set of openings used to describe balanced hands of various strength.

Notrump structure in various bidding systems
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
Standard American Yellow Card 0.5NT 1NT 1.5NT 2NT 2.5NT 3NT
Bridge World Standard 0.5NT 1NT 1.5NT 2NT 2.5NT Kokish relay to 2NT
Culbertson and Goren (original) 0.5NT 1NT 1.5NT 2NT 3NT
Goren (revised) 0.5NT 1NT 1.5NT 2NT 2.5NT 3NT
Acol 1NT 0.5NT 1.5NT 1x - 3NT 2NT 2.5NT 2 - 3NT
Precision 0.5NT[1] 1NT[1] 1-1NT Kokish relay to 1NT 1-2NT Kokish relay to 2NT 1-3NT Kokish relay to 3NT

ReferencesEdit

  1. 1.0 1.1 Some reverses the 0.5NT and 1NT when non-vulnerable

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