Drury
A means to check if partners 3rd or 4th seat opening bid is a standard or light opening. So in the auction P-P-1?-P- or P-P-P-1?-P- , 2
asks partner to clarify the opening.
Opener rebids 2
if the opening was light, otherwise he makes his normal rebid.
See also: Reverse Drury
Compiled by Lorne Russell 2005