sanst, on 2019-March-01, 02:20, said:
Pran mentions the appropriate laws, but doesn’t answer the question about the number of tricks. The TD should find out whether the declarer has an accurate idea about the remaining cards. If so, the lkast two tricks go the the declarer, otherwise I would give EW one trick, which, I think, is the most likely decision.
Even if declarer did not have an accurate idea about the remaining cards before the incident, he does now he has seen partner play the 4 and then the King dropping. So it's not easy for the TD to find out, although I guess he could start by asking declarer what West's remaining card is.
Law 45F says:
"At the end of the play the Director shall award an adjusted score if he considers dummy suggested a play to declarer and the defenders were damaged by the play suggested." Dummy certainly suggested a play to declarer, and making that play damages the defenders. Is that not enough?