B-M PRECISION
Opening 4 Diamonds Auctions

by E.B. (okbridge:Everett -- Comments, questions, suggestions welcomed.) -- Copyright © 1999

The Namyats 4 Diamonds, B-M Precision Style

The 4 Diamonds opening in B-M Precision shows a 5-loser hand with 7 or 8 solid spades.
With 8 spades, they're AKJ or better, with no outside A, but perhaps a K.
With 7 spades, they're AKQ or better, with an outside A or K.

Responses to 4 Diamonds

Pass	Only in competition, TBS.
4 H !	Relay. Asks about outside controls: 4 S = 8 spades, no outside A. Then 4 NT asks: 5 C cK, 5 D dK, 5 H hK, 5 S none. 4 NT = 7 spades, unspecified K. Then 5 C asks: 5 D dK, 5 H hK, 5 S cK. 5 C = 7 spades, club A or void. Then 5 D, 5 H CAB; 5 S, 6 S to play. 5 D = 7 spades, diamond A or void. Then 5 H, 6 C CAB; 5 S, 6 S to play. 5 H = 7 spades, heart A or void. Then 6 C, 6 D CAB; 5 S, 6 S to play.
4 S	To play, sign-off.
4 NT	Void ask: 5 C, 5 D, 5 H show void there; 5 S no void.
5 C, 5 D, 5 H	CAB.
5 NT	Modified GSF: 6 C better than minimum suit, 6 S minimum suit.
Notes	In other continuations, new suits are CAB, 5 NT is the same Modified GSF.