ralph23, on Sep 9 2007, 05:59 PM, said:
Dummy must not participate in the play, nor may he communicate anything about the play to declarer.
Ralph,
You are claiming that dummy cannot say "Wait, you have all 13 tricks" because it is in violation of the laws. Play has ceased (concluded) at the point the claim is made, so dummy cannot be participating in the play (nobody is). He also did not participate in or direct declarer in any such manner. He simply stated, you have all 13 tricks. Granted, declarer may not have seen it at this point, but dummy is fully within their rights at this point to say "Wait, you have all 13 tricks" and call the director.
When a claim is made,
68.D Play Ceases
"After any claim or concession, play ceases. All play subsequent to a claim or concession shall be voided by the Director. If the claim or concession is acquiesced in, Law 69 applies; if it is disputed by any player
(dummy included), the Director must be summoned immediately to apply Law 70 or Law 71, and no action may be taken pending the Director's arrival."
This specifically gives dummy the right to not accept a claim or concession by either side. There is no arguing that. It is right there in black and white.
He should not tell declarer how they are available though. He didn't. All dummy said was "Wait, you have all the tricks." He should not say "If you cash all the clubs, pitching hearts from dummy, and then ruff the last heart you make 13 tricks". (He can tell that to the director who is about to arrive though

).
Call the director and let them sort it out.
The question converts to: Would a player of this caliber actually have only made 12 tricks if the hand had been played out? I don't think so.
My gut instinct is that since it would be irrational for declarer to do anything other than pitch hearts from dummy and take all the tricks, you practically must award them all 13, along with a warning to be a little more careful with their claims. Phil hasn't said this was actually the ruling, but I have to believe this is what happened based on the way the laws are written.
Since declarer obviously initially didn't see that they had all 12 tricks and might not have without dummies warning (declarer stated he had 12, opponents agreed), the "right thing" is the result stands as claimed.
Sometimes, the "right" thing to do, and the laws simply just don't agree. In this case, it would be practically impossible for declarer at some point in the play to realize that they simply needed to pitch a heart from dummy and then ruff one, thereby making all 13 tricks.
The score should be adjusted accordingly.