West open 4♦ natural.
This is the first hand where there is heavy preemption. Although this is often a question of judgment, it is also one of style and and systems in competition.
The first question is, of course, what to do over the preempt. Should North just bid hearts, or double, or bid some type of two-suited overcall? You will see that all of these choices were made. I'd be interested to hear the thoughts of the bidders on why they felt their choice had the best chance to work out.
We now turn to South. South has an interesting hand after action from his partner. He has four card spade support (if North happens to show the majors), two honours in hearts, and a doubleton club. However, South has one major liability, in my opinion. He has 5 diamonds under the preemptor. For a 4-level preempt, I would expect West to have either 8 diamonds or a 7-4 shaped hand. Since the hand is flawed if that 4-card side-suit is a major, I'm banking on an 8 card preempt. This leaves none for partner, but also none for RHO. Can anyone say trump promotion? (Although it doesn't make any real difference on this board.)
The limit on these hands is 5♥ or 5♠. Should be interesting to see how the pairs faired.

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