bluejak, on 2012-May-08, 09:57, said:
1♥ was described as "asking for heart stop for NT, 6-7". It was intended as natural, 6-7. N/S had system notes: they showed 1♦ dbl 1 ♥ as natural, but without reference to the meaning of double. North poiinted out that in analogous situatins where an opponent shows two known suits, bidding one of them asks for a stop.
West said, fairly reasonably, that he "knew" he had heart tricks from the 1♥ bid, and would not have bid 4♠ if 1 ♥ was described as natural. East said if he had known the hearts were offside he can squeeze North in the rounded suits for one down.
The correct full explanation would have been something like:
"In general, we play 1
♦-(dbl)-1
♥ as natural. However, we have not specifically discussed whether the meaning of 1
♥ is affected by the meaning of the double. We also have a general agreement that in situations where an opponent shows two known suits, bidding one of them asks for a stop."
So was there misinformation? Clearly, yes.
Whether E/W were damaged by this misinformation is rather less clear.
East jumped to 3
♠ at unfavourable vulnerability. Presumably this showed reasonable playing strength. In that context, I would expect West to raise to 4
♠ anyway with a fifth trump and a decent hand. Also, even if 1
♥ is known to be natural, there is still a fair chance that
♥K will be in the hand which has shown (usually) at least 16HCP, so I am not convinced that West would have bid differently with the correct explanation.
In my opinion, the damage in the auction for E/W was caused by East's decision to push on to 5
♠, but the 5
♠ bid was not (claimed to have been) affected by the misinformation.
I have a lot more sympathy with East's point that he might have made 10 tricks in 5
♠ on a squeeze had he known about the hearts. The TD should find out how the play went and consider adjusting to 5
♠x-1 by East, N/S +200.