Phil, on 2011-May-17, 09:05, said:
- Declarer claims with a poorly worded statement (pressed for time? intimidated?);
- (Experienced) Defenders look confused;
- Declarer gets woken up to a problem regarding bad splits, and...
- Modifies the claim statement, and doesn't specify a winning line.
How can you award 12 tricks?
I don't believe it would be rational to play all the other cards before playing trumps. Especially if you are unaware of the possibility of a bad split, it's normal to start by playing some trumps. The claim law allows declarer to notice someone showing out and include that in whether continuing on that line is irrational or merely careless.
If there had not been a heart lead it's obvious to award 1 off, since you need to take 3 ruffs, but after the heart lead you only need two and you can take them both with the trumps outstanding, after discovering the bad split, even with a trump return.
Maybe it is correct to rule a failing line is merely careless, but I have no problem with a director awarding 12 tricks under the circumstances.