What was wrong?

[4321]

Thanks all, especially Free and P Marlowe, because I think the same. :blink: "The first opinion is always true" (international proverb).

 

http://www.bridgeguys.com/Conventions/FourthSuitForcing.html

As we can see, spade repeat (2s or 3s) should show spade 6+ or very good 5.

 

It's possible to bid 3d instead 3s, but it should be very intuitive bid, because opener, remembering the variation of the rule of symmetric by E.Culbertson (if I hold a long suit, may be my partner holds a long suit too), hopes to find 5 in spade in partner's hand.

+ he haven't see slam intentions in that moment.

 

That 9% slam was wined. Fortuna...

[bucky]

http://www.bridgeguys.com/Conventions/FourthSuitForcing.html

As we can see, spade repeat (2s or 3s) should show spade 6+ or very good 5.

I think you are confused with 4sf in reverse sequence. In a normal sequence, repeating your own suit at minimum level wouldn't be forcing, so with 5+ in the suit and GF value you often need 4sf. In reverse sequence if you can repeat the suit without fear of getting passed out, your 4sf should DENY 5+ in the suit.

[4321]

May be, but is this principle common for Main Bridge Club of BBO? How to be sure? Here is a point.

 

Here is my variant:

1d - 1s

2h - 3c

3s - 3n

4d - 6d/n

 

3n - stronger than 3n without 4th suit, expecting quantitive invit 4n or Gerber,

4d - good diamonds 6+,

6d/n - normal bid with figur addition in diamonds and not minimal strengs.

[bucky]

Well, I don't know there is any principle at BBO, other than "no to assume anything". If you are playing with a random pick-up partner, bidding to 6♠ is really expected. Without good agreement, it is impossible to bid well.