Cyberyeti, on 2020-June-26, 16:17, said:
But is he 0436 in which case we need to play in hearts, 0634 when we need to play in clubs or 0535 where we can't get rid of the diamond loser.
He doesn't necessarily know the answer as we don't have to be just 5-5.
True enough - bidding is almost never a certainty but rather an exercise in assessing probabilities and finding ways to skew the odds in our favour. When I first suggested 6
♣ it was more of a theoretical idea rather than seriously thinking about bidding on. But now after giving it some thought, it seems to me that that auction genuinely does change the odds on this hand. Bidding on becomes the action of partnership trust. Now I would agree that it takes a ridiculous level of trust to make the action but if we accept that partner thinks like us and must therefore have one of these hands for their pass, then bidding has become cheap insurance.
If I had to assess the relative likelihood of your 3 examples, I would rate the 55 as most likely followed by the 64, with the 46 most unlikely. That seems to suggest 7
♣ as the call. Would I do it in practice? Almost certainly not, that's an insane level of trust to have in a partner at the level I play and an unreasonable level of respect for partner to have in me if it goes wrong. But opposite a super-expert version of myself, absolutely, 6
♣, followed by 7
♣ if partner FPs, is surely indicated.
+++++++++++++++++++++
West advertises an unlikely ♠ A x x x x x ♥ - ♦ K Q x x x x x ♣ -.
If so, 6♠XX might make and 7♥X is likely to be defeated by 1-3 tricks, vul. Although West may well be bluffing, can we afford to take the risk? IMO: No. So you should bid 7♥, being prepared to congratulate West and apologise to partner but North's forcing pass over 6♠ implies you might even bask in team-mates' praise when partner turns up with ♠ - ♥ Q x x x ♦ J x x ♣ Q x x x x x