[Bbradley62]

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What would 3♠ have been instead of 3♥?

[pigpenz]

I assume its similar to unusual vs unusual
3♠ would just be competitive
3♥ limit raise since we know they have hearts
3♣♦ are some form of game forcing bid in that suit

[Bbradley62]

I would expect the same. So, 3♠ would be something like "3+S; 7-9 total points"? That looks to me like what North actually holds.

[pigpenz]

probably the fourth trump has something to do with the call also hedging it towards the limit raise vs raise in competition

[georgi]

3♠ is the call which match the hand properly.

will be fixed to be more accurate when picking the Limit raise after opps overcall.