[patroclo]

Sometimes an opp claims all the tricks while these are all of the declarer. I think that also the dummy have to accept not only the declarer. Because 2 players control the claim better than 1

[mgoetze]

So now all of us bridge players have to wait for dummy to come back from his cigarette break just because some small minority is playing a different game where declarer never thinks about how many tricks he can take? No thanks.

[fourdad]

silly idea

[helene_t]

declarer can always ask "hey dummy, can you see if the claim is right?" if he is unsure.

[patroclo]

I am speaking on bbo game.
It happened that an opp claimed instead than concede all the tricks during a slam. Declarer accepted, but after there wasn't any way to correct the mistake.

[nekthen]

I think that defenders should not claim. Maybe the software should only allow claims by declarer

[GrahamJson]

Claiming is ok, but only if you are certain. I have seen claims which were refused, because a defender still had a trump or two. In some cases I suspect that declarer had miscounted and may have gone down if he had not been reminded by the refusal. Actually I think the rules state that declarer cannot draw trumps following a claim unless he specifies this when claiming, which on BBO you can't.

Defenders should also be careful when claiming or conceding. A partner once conceded all the remaining tricks in a high level contract. Declarer swiftly accepted before I could point out that I had the outstanding trump, not declarer, as partner had assumed from the bidding, and a running suit. So partner's concession turned minus 4 to plus one (or something like that).

[barmar]

The Laws of Duplicate Bridge say that dummy is allowed to contest a claim. But our claim procedure is actually much more like rubber bridge (when a claim is disputed, we play the hand out with the claimant's hand exposed, instead of having a TD adjudicate). In rubber bridge, only declarer is allowed to dispute a defender's claim.

[SelfGovern]

GrahamJson, on 2015-September-03, 09:42, said:

<snippage> Actually I think the rules state that declarer cannot draw trumps following a claim unless he specifies this when claiming, which on BBO you can't.
<snippage>

In fact, there is a text box included when you push the claim button. So declarer (or defender) could easily enter something like "Drawing trump" or "3!h, 2!C, 1!S" or "You get 2 diamonds at the end". I recommend using this to clarify your claim, although most people here do not.