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Ineffective False Card

West
A1064
AK43
J2
Q96
North
J973
Q1098
954
104
W
N
E
S
1NT
P
P
P

 

Playing standard signals, the opening lead was the A (K being the power lead, A asking for simple attitude), East played 6 and declarer 7

On the face of it it East's signal appeared to request be continued. That only made sense holding the J yet both the five and the two are still missing, so if declarer's card is honest it must be a singleton -- unlikely. Therefore declarer is known to have played the 7 holding at least one card lower than that. The algorithm is to signal in the same manner as your opponents, so it appeared as though both East and South were trying to get a continuation. Unless, that is, that the 6 was singleton. That was indeed so, and West shifted to a for down two. Declarer held K2 J752 AK1073 A4.

I was struck by this. It seemed as though concealing two lower spot cards might have been less effective than just playing one of them. I wondered if anyone had encountered a similar situation. Perhaps I am making too much of it as it possibly is another example of the advisability of playing your cards randomly. Were declarer to play randomly from 7x or 7xx West would not be able to deduce much.

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