[kgr]

Against a 4H contract you lead a small club.
Dummy has ♣AKx.
Obvious switch suit is ♦. Should ♣Q from your partner promise ♣J or does it ask for a ♠ switch? What is the best agreement here? (You have the agreement that ♣Q from your partner promise ♣J If you lead ♣A and ♣K is not in dummy).

Thanks,
Koen

[mike777]

If you play "os" and you lead a small club and I assume dummy wins and partner plays the Queen. Yes partner promises the Jack of clubs or a stiff. It is not suit preference. Partner plays some other high club to ask for a spade to give you a ruff and low club to ask for a diamond. Good question. btw I strongly recommend you get the book if you want to play the system in full.


The whole point of '"OS" is attitude 99.9% at trick one, not count or suit preference.

[Winstonm]

OS should apply only to spot card signals - honor cards should retain their normal meaning.

[Flame]

One thing for sure, it shows the J since partner wouldnt just throw a Q giving up a likely trick, the second sure thing is partner doesnt like the obvious shift.
The thing in question is does he like the other suit (spade), You will normaly know if you need to switch base on the bidding so its not crutial. With QJ2 and nothing in diamonds he will play the Q wather he like spades or not.

[pclayton]

Ask yourself if you can afford the Queen in the 1st place.

Assuming you can, what I play with my regular partner is that it promises the Jack, but also indicates interest in the non-obvious suit in dummy.

Signaling for the non-obvious suit should be done rarely however, and its usually only in a case where the obvious and non-obvious suits are barely indistinguishable from each other; Axx versus AJx for instance.