ROPI (Redouble 0, Pass 1)

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.

5 KQT5 AT987 A63

You 1 ? LHO 3 Partner 4NT RHO Dbl 1

1. 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:

Response	Meaning
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:

Response	Meaning
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.