This appeal, published in the bulletin, would decide the winner of the national swiss pairs championship. Both pairs are strong but not regular partnerships, N/S have both represented their country and got several national titles. N/S did not notice an alert of 1♥, which showed 4+ spades, and never asked about the meaning. E/W claimed there had been an alert by tapping the table (no screens).
When the TD is called after play (5♣X=, N/S -750, I am not sure if the TD was first called after Dummy was displayed and later recalled) North says he would not have doubled if correctly informed about the meaning of 1♥. The TD decides to adjust and removes the double (5♣=, N/S -600), which only improves N/S's MP-score from 17 to 30% (as one can imagine, the 59 tables produced a lot of different results on this board).
N/S appeals, claiming that the missing alert also influenced the earlier rounds of bidding. As it went E/W were practically pushed into game and N/S also made it clear to East that his partner did not have much wasted in spades. They were not sure how the bidding would have gone, but a likely start was 1NT (or 1♠) from North, 2♥ from East and 3♣ from West. They agreed East would probably make another try with 3♥, but believed it was likely that E/W would then stop in 4♣. E/W agrees the bidding might have startet differently, but believe they would still reach game.
I was on the committe, and we decided:
It didn't really matter if there actually was an alert, since according to our regulations it is the alerting sides responsibilty that the alert is noticed. Had they noticed an alert both North and South would probably have asked about the meaning in this situation.
There are several possible developments, including that North may double 5♣ even with a correct explanation. The ruling, taking into consideration that E/W are the offending side, was a weighed score; 2/3 of 4♣+1 (N/S -150), 1/6 of 5♣= (N/S -600) and 1/6 of 5♣X= (N/S -750). For N/S this resulted in a score slightly above average on the board.
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