mamos, on 2012-October-03, 12:21, said:
Interesting if obscure problem and in my opinion not one anticipated by the lawmakers. I don't think it matters enormously, it will probably be another 100 years before it happens but I do think it's reasonable to argue that the TD and the AC decision could have been different.
All we can do is look at the Law and particularly the wording therein. Arguing about what "contributed" means won't help. It's not a word found in the Laws.
If dummy places in the played position a card that declarer did not name, the card must be withdrawn if attention is drawn to it before each side has played to the next trick,
I think these two cards are indeed played - declarer has named the card in dummy "another top Spade" and the defender has apparently played a Diamond.
For me the crucial question is whether these cards are played to the next trick. Clearly the intention of both players is to lead a card to a trick - indeed different tricks. What worries me about this is West's actions. If we are not careful a cunning defender will always be able to "establish" dummy's mistake by smacking a card on the table for the next trick. Now I'm not suggesting that is what happened here but it makes me worry about the TD/AC ruling
Mike
What I consider obvious from the story so far is that
Declarer thought
he had won the trick with a high trump from Dummy while
West thought
he had won the trick with the highest trump (apparently) played to the trick.
Both players thought they were leading to the next trick.
The important question which has not so far been answered here, and which indeed
is not answered in the laws, is whether the two such separate
leads to the next trick in fact imply that both sides have
played to that next trick?
My personal understanding of the laws is that WBFLC in Law 45D thinks of both sides having played to the next trick
in a regular way, i.e. with a lead and a subsequent play as described in Law 44 (without any irregularity).
Here the previous trick was won by Dummy because the card played from Dummy was the high trump called by North. However, as Dummy actually placed a low trump in the played position West thought he had won the trick and led to the next at the same time as North called the next card to be led from Dummy. The result was not a lead and a subsequent play to the next trick.
Consequently I would allow North to change the play from Dummy in the last trick to the high trump which he requested, and that both defenders may change any card they subsequently played (including the "lead" by West to the next trick) without any rectification.