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DOPI, ROPI, DEPO, REPO |
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– when your Blackwood/Gerber is interfered with. |
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DOPI (Double 0 Pass 1) and ROPI |
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It does not matter if you play 4♣ or 4NT to ask for aces (or key cards), if the opponents bid over your asking bid then obviously things change. I have witnessed this at the club when a lay-down 7NT (13 tricks off the top) was missed. |
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Let's assume you are playing simple Blackwood, you have 2 aces and partner bids 4NT to ask. Your response is 5♥, but what if your RHO sticks in a bid of 5♦ ? The answer is the DOPI convention: - |
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Double |
= |
1st step |
(0 aces) |
| Pass |
= |
2nd step |
(1 ace) |
| Next bid (so 5♥ here) |
= |
3rd step |
(2 aces) |
| Next but 1 bid (so 5♠ here) |
= |
4th step |
(3 aces) |
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etc... |
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The same principle applies if you play RKCB, Gerber or whatever. Note that the lower responses (double or pass) allow for a possibility of defending against a doubled contract by opponents. Often a good idea if you are short of aces/key cards! |
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If RHO doubles the asking bid, then there is a similar convention (ROPI) |
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Redouble |
= |
1st step |
(0 aces) |
| Pass |
= |
2nd step |
(1 ace) |
| Next bid (so 5♣ here) |
= |
3rd step |
(2 aces) |
| Next but 1 bid (so 5♦ here) |
= |
4th step |
(3 aces) |
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etc... |
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Now I have been careful to mention steps here. For example, If you play standard RKCB then |
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1 st step = 0 or 3 key cards, 2 nd step = 1 or 4 key cards etc. |
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(the other way round if you play 1430). |
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DEPO (Double Even Pass Odd) and REPO |
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This is a less popular variation of the above but has the advantage that the opponent's can always be doubled for penalties. |
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So when your Blackwood bid is overcalled it's REPO: - |
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Double |
= |
Even |
(0, 2 or 4 aces) |
| Pass |
= |
Odd |
(1 or 3 aces) |
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And if your Blackwood bid is doubled: - |
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Redouble |
= |
Even |
(0, 2 or 4 aces) |
| Pass |
= |
Odd |
(1 or 3 aces) |
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You have to decide if you prefer D(R)OPI or D(R)EPO. I actually know of one pair that play |
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D(R)OPI at the four level and D(R)EPO at the five level. I guess that that makes sense – you are more likely to want to penalise the opponents at the five level. |
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Pattaya Bridge Club - |
www.pattayabridge.com |
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