[jmcw]

On the final board of the round declarer claimed the last 5 tricks by showing his hand, partner and I readily agreed conceding the remainder. A couple of minutes later the round was called, suddenly I realized the claim was bogus and called the director. Sure enough declarer had an unavoidable loser.

How do you rule?

[aguahombre]

Agreement to a claim may be withdrawn during the "correction period". Perhaps you were thinking about the different timing allowed on drawing attention to a revoke.

[iviehoff]

aguahombre, on 2011-September-18, 19:48, said:

Agreement to a claim may be withdrawn during the "correction period".

We need to be careful here, as the precise timing of withdrawal of agreement affects how the claim is ruled (L69A). If you withdraw agreement before the round ends, or before your side makes a call on the next board, whichever is sooner, you can get the claim adjudicated as if you had never agreed to it, under L70. However if you withdraw assent after that, but before the end of the Correction Period, the claim is adjudicated under the rather less advantageous rule of L69B. L69B is rarely applied, so what this rule actually means has been little tested. It sounds like you are too late for a L70 adjudication, but in time for a L69B adjudication. If you "would likely have won (the trick) had play continued", then it is yours under L69B. The word "unavoidable" might make it sound like you "would likely have won" it. However if you are relying on perfect defence to suggest it is "unavoidable", then the director might disagree that you "would likely have won" it.