I thought a bit more about this after posting.
1
1
Pass 3
The full description the bots give is not really accurate. I'll get to that in a minute, first some toughts on what 3
should be.
One possible agreement. The 3
shows a strong hand that from responder's point of view can be played in diamonds or in NT.
Another possible agreement, along the lines you suggest: A strong hand that can be played in diamonds or NT, but possibly also in spades. So there is a spade tolerance.
Exactly how strong is strong? That could be discussed but I doubt that advancer will often have a hand where he wishes to force to game after the 1
overcall, except in the case where he has a spade fit. So in any agreement where it shows at most a spade tolerance it seems it should be at most a game invitational call. But maybe forcing for one round.
What is common in all of this is that playing in hearts has been ruled out.
The hand is interesting but maybe an anomaly. Looking at all four hands I guess if we are going to play in game it needs to be in hearts. We could probably re-arrange the cards to make 4
work. It's also true that if E shifts to his stiff diamond at trick 2 I had better be a good guesser. If trumps are 3-3 I can draw them and then lead the spade for my 10th trick. But they are actually 4-2 and that line would be a disaster. As near as I can see, if it starts with club to the A and a shift to the stiff diamond I have to win in hand, cash the KJ of hearts, go to the board in diamonds since E now cannot ruff, and lead the spade. Realistically, I doubt that I would be doing that.
Back to what the bot says about 3
.
"2-
; twice rebiddable
; 14+ total points, forcing to 3
. I altered this to just saying that the diamond bid was natural because that reflects what he actually has. As I use language, "twice rebiddable" means the suit is suitable for bidding, then rebidding (once rebiddable) and then rebidding again (twice rebiddable). Clearly this is not what he has. I have seen this before with the bots, they claim "twice rebiddable" when I would call the suit "at most once rebiddable" or "rebiddable in a pinch", definitely not twice rebiddable. So I have learned to ignore that part of a bot description.
I have found that playing with the bots can lead to useful discussion with partners. I gave my hand to my f2f partner and asked how he would interpret the auction as we went along. He took 3
as a strong natural bid, he bid 3
over 3
, but then he corrected 4
to 5
. Actually pretty reasonable. If N actually has the twice rebidabble diamonds to go with his four hearts he probably has a stiff club. He has two clubs, but he has room for them because his diamonds are not of the length one might well expect.
Anyway, 4
bid and made was a good result. A bit iffy even for those who have discussed auctions.