ROPI is the acronym for "Redouble = 0, Pass = 1." It is a convention used after partner bids 4NT Blackwood
or 4 Gerber
, but the next player doubles. This situation is rare, but occasionally occurs when the opponents double to show a potential sacrifice, e.g.
- Shows spade support in case partner likes his hand and is interested in sacrificing. A direct 5 overcall would be stronger.
Using ROPI, responder has the following bids available:
|Redouble || 0 aces|
|Pass || 1 ace|
|Cheapest bid over the overcall || 2 aces|
|Second-cheapest bid|| 3 aces|
|Third-cheapest bid|| 4 aces|
If playing Roman Key Card Blackwood, the responses are:
|Redouble || 0, 3 or 5 keycards|
|Pass || 1 or 4 keycards|
|Cheapest bid over the overcall || 2 keycards without the trump queen|
|Second-cheapest bid|| 2 keycards with the trump queen|
If partner bids 4NT followed by 5NT, he is making a Blackwood query for kings. All other rebids by partner are natural signoffs.