[tamayo9]

One time during tournament, I played 4d, when it reached last 4 tricks. I claimed all winning. Opp refused, then opp claim he win all which is totally opposite.
I thought it is conceded all and click yes. Now 4d +1 become -3. TD refuse to correct. It was frustrating. Can BBO software prevent this? At least put +/- 2 trick range to detect bad intentions?
I also saw some player to make partner angry and intentionally conceding all.

[helene_t]

I think this is a good idea.

Maybe give a warning before accepting a claim that differs from dd?

Strictly speaking it's probably illegal as the software would be helping you by giving a clue to what the dd result is. But i think it should be ok since once you have rejected a claim you get to see all the cards anyway.

Providing the same service to claimer probably isn't a good idea as it could be abused.

Ising the robot vlaim engine instead of DD is a possible alternative but sometimes claimer has access to more info than thevrobots have.in a friendly game, people sometimes claim based on bidding info or info that has transpired through an undo.

Downright prohibiting missclaims is not a good idea aa players could have reasons for accepting a claim that is technically wrong, for example to compensate for an infraction.

[barmar]

Perhaps an extra confirmation should be required when conceding all the remaining tricks.

This is similar to what we do in robot games, since the GIB software only allows conceding unless you're declarer leading from hand or dummy.