
4
♠
imo all other calls=0, assuming partner knows how to play Bergen raises. I believe there are three ways to learn how to play this style (which I rather like):
1. Read the basic rules, then play it with a regular partner for a few years. Learn from experience.
2. Learn from an experienced expert teacher or mentor.
3. Read and study the two Larry Cohen 'law of total tricks' (LOTT) books, then tackle Mike Lawrence and Witgrn(sic) book called 'I Fought the Law of Total Tricks'.
One needs to appreciate the importance of hand 'purity', secondary suit fits, and of singletons and voids in addition to that of the combined length in the trump suit.
Imo, two equivalent minimum vulnerable 3
♠ raises would be:
Q10xx
xx
xxx
Axxx
for a balanced hand (7 dummy points), and
Q10xx
x
xxx
J10xxx
for an unbalanced hand (6 dummy points), or
10xxxx
xxx
xxxxx
for a very unbalanced hand (5 dummy points).
All theses hands give you a decent play for 4
♠ even if you don't have the heart queen, which as one commentator pointed out adds little to the value of this hand given the auction so far. Indeed, it is a negative, imo.
The old fashioned dummy points formula works fairly well, up to a point. Non-vul (or if I needed a board) my minimum would be even less.
Anyhow, space precludes any digression into what the opponents might be able to make, but I think the LOTT should save you most of the time 4
♠ goes down.