Posted 2012-January-03, 06:30
This whole discussion is very similar in nature to some other cases we looked at previously. They all come down to the inconsistency/incompleteness of the laws relating to defective tricks and played cards. There are all sorts of scenarios but the basic starting point of many of them is either:
(1) Dummy (or indeed another player) fails to quit a card played before both sides have played to the next trick. (Indeed, it may be too late for declarer to rectify dummy's failure to quit the card properly as soon as someone leads - 65B3.)
(2) A player picks up a played card (his own, or someone else's) and puts it in his hand.
Just the above can be sufficient for there to be a defective trick, even though we all know what was played to it. Extra fun is added when, as in the current case, another card was quitted instead by dummy, or a player plays a card that was previously played.
It is apparent that the law is defective in the area of management of played cards. Among other things, it does not tell us what to do with a card that has been played to a previous trick, if we find it somewhere it should not be. It does not tell us if that card may be played, apparently for a second time. It does not tell us, when a card does end up being played twice, which of the occurrences of its being played count. And no doubt some other rather important things.
The law needs fixing here. There is more than one plausible answer to the unanswered questions I mention. Different people imagine different answers to those unanswered questions. It doesn't matter what ruling one suggests in these cases, they are all demonstrably wrong. The best one can do is attempt something reasonable.