Posted 2019-March-18, 11:35
FWIW, mu view is that a reopening double is automatic with this hand.
That is so even if N-S don't have the normal agreement that a double by North of 4S would be card-showing, rather than penalty.
A rare but important side-effect of that standard (at least amongst good players) agreement is that North has to pass 4S when he has a penalty double, and hope that partner can reopen. Here, as it happens, North doesn't have the penalty double hand, but South's void makes it reasonably likely that he does. In any event, reopening with a double has far more upside than downside
We may be able to defeat them, when partner is able to pass
We may reach a making contract, and there is no way we can beat 4S, undoubled, enough to outweigh that plus
We may reach a failing contract but, even if doubled, go down less than they score for making 4S
We may push them one level higher, and beat 5S when we can't beat 4S (or beat them more)
Both sides may have a making game, including us at the 5-level
As opposed to that, we lose if has a terrible hand, since they probably make if he passes and we may go for a number if he bids. As against that last factor, it is often difficult to double if the 4S bidder has extras...his partner will play him for a 4S preempt, and the preemptor won't know whether it is his partner who is bust. Btw, as North, with a terrible hand, one should plan what one is going to do over a reopening double while giving the usual 10 sec pause over 4S. Then one can bid in tempo. The worst thing one can do is to pass 4S, without anticipating the problem, and then go into the tank before coming out with an agonized 4N or 5m...now the opps are more likely to scent the blood in the water.
Over the reopening double North has a comfortable 5H. Yes, slam is possible with this hand, but once the opps jam one, one should tend to aim low.
Reopening with 4N does prevent the possibility of pass from North on a poor hand, but allows West to make a cheap strength-showing double with a good hand, and thus allows his partner to double our run-out more aggressively. Note that West would need an extraordinary hand to be able to redouble 4S, and such probably says more about his offence than his defence ( AKJxxxxxx Ax x x as an example to be worried about, as his partner thinking about a 5-level decision).
Also, and critically (tho not on this actual hand) 4N eliminates the very real prospect of beating 4S x'd, and to make things worse, making going down in our contract instead.
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari
Do you reckon you have enough to reopen here? If so, X or 4NT?'
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IMO Cross-imps is OK.
Although I prefer match-points or even
Butler (because it's easier to check scores)
I rank
1. Double = T/O
2. 4N = ART Unilateral.
3. Pass = NAT Pusillanimous.