January Bidding Contest: the results!

This is all a question of strategy. Clearly, if the opponents play in 6♣, we will be on lead and all will be well. But how do we go about getting partner to lead a heart against 6♠ and not giving a ruff-and-discard in Diamonds?

Cronier had the time to think about it since it was he who submitted the problem to me: “5♥. I know this deal. At the table, I recommended bidding 5♥, a bid going for 6♦ but with a heart lead against an opposing spade or club contract. I still advocate that.” The other experts were not of the same opinion and most preferred to leave the problem for later, more or less aware of the danger. I have chosen the most detailed and convincing explanations.