DEPO is the acronym for "Double = Even, Pass = Odd." It is a convention used after partner bids 4NT Blackwood
or 4 Gerber
, but the next player overcalls (usually in a sacrifice attempt). Using DEPO, responder can make these conventional calls:
|Double || 0, 2 or 4 aces|
|Pass || 1 or 3 aces|
If playing Roman Key Card Blackwood
, a double would show 0, 2 or 4 keycards
, while a pass would promise 1, 3 or 5 keycards
If partner bids 4NT followed by 5NT, he is making a Blackwood query for kings. All other rebids by partner are natural signoffs.
DEPO responses are vaguer than DOPI
, but its benefit is that it can be played at any level, like when the opponents sacrifice at the 6-level over 4NT.
See also ROPI
when the opponents double 4NT.