What do I do if partner makes a non-alertable bid that we have never discussed and I'm asked what it means? Is my correct answer "undiscussed", or do I tell them what I think the (undiscussed) system definition is, risking UI if partner somehow had a different take?
Basically, I'm having a hard time reconciling 2 different principles I believe I should be following:
1. If you haven't discussed something with your partner, best way to avoid UI is to say "undiscussed." Corrollary: NEVER tell the opponents how you are "taking" partner's bid.
2. Opponents have a right to know what we know about partner's hand.
2. Opponents have a right to know what we know about partner's hand.
Bottom line...do the inexperienced opponents ever end up victimized by their lack of awareness of basic bidding?
Does your answer matter depending on whether it's a common/simple system detail, a less-common detail where there are some disagreements out there over the best approach, or if it's an esoteric detail?
Just some specific examples that occur to me, although I'm most interested in the generic answer:
1. 1H-2D (game-forcing with 5+ diamonds). What do I say if I'm asked what 2D means?
2. 1H-1N-2C-2H (weak responding hand, likely only 2 hearts). What do I say if I'm asked what 2H means?
3. 1S-1N-2C-3S (3-card limit raise). What do I say if I'm asked what 3S means?
4. 1S-1N-2S. What do I say if I'm asked how many spades 2S shows?
5. 1S-2C-2S. What do I say if I'm asked how many spades 2S shows? (Here I think I definitely say undiscussed since different people play 5 or 6.)
6. 1S-2S-3C. (Here you haven't discussed help-suit game tries, but you know that ALL local intermediates play them so you're 100% confident that's what partner is doing.) What do I say if I'm asked what 3C means?
2. 1H-1N-2C-2H (weak responding hand, likely only 2 hearts). What do I say if I'm asked what 2H means?
3. 1S-1N-2C-3S (3-card limit raise). What do I say if I'm asked what 3S means?
4. 1S-1N-2S. What do I say if I'm asked how many spades 2S shows?
5. 1S-2C-2S. What do I say if I'm asked how many spades 2S shows? (Here I think I definitely say undiscussed since different people play 5 or 6.)
6. 1S-2S-3C. (Here you haven't discussed help-suit game tries, but you know that ALL local intermediates play them so you're 100% confident that's what partner is doing.) What do I say if I'm asked what 3C means?