Yesterday my partner and I had to solve a very difficult puzzle. Unfortunately we did not manage it. Here is the full board: North KQ2 AKQ109 KJ973 --- South A1053 J A AQ109764 East started with a weak 2♦ (from 0 points and at least a 5 card suit). South 3♣. North 3♥. South 3♠. North 4NT (quantitative) and South interpreted it like that. NS do not have agreements after a quantitative 4NT. South 5♦. North 6♥. South 7♣. I have three questions: 1. What should be the meaning of 5D? 2. What do you think of 6H and 7C? 3. Who is to blame? You can share the blame between North and South.
