[blml] Inaccurate Convention Card

[Wayne Burrows]

At the recent Gold Coast Congress (Australia) I declared 3NT on the
lead of the heart jack.

I cannot remember the rest of the hand and do not have any hand
records with me while I am in transit.  My heart suit was:

K876 (dummy)

A10x (hand)

The opponents had been silent after I opened 1NT and my partner bid Stayman:

1NT 2C
2S 3NT

I glanced at my opponent's convention card and noticed that "underlead
honours" was checked and proceeded to win the heart ace and
immediately run the 10 which lost to the queen.

It turned out that "underlead honours" was an error and "overlead all"
was also checked but I had not noticed this - why would I look when
underlead was also checked - they can't play both methods.

The director and the appeal committee agreed that the convention card
was in error but did not adjust my score saying that I should have
found out more about the opponents methods.  Presumably by asking
questions or reading more of their card.

This seems wrong to me.  Am I really supposed to assume anything I
hear or read in explanation is wrong and look elsewhere in case there
is a contradiction?

Wayne