As a defender, it's usually not wise to inform declarer you have a
surprise for him. Here is a hand where defeat was almost certain
until the defense opened its mouth.
Scoring: Matchpoints (pairs)
Hand #8
Dlr
W
Vul
E/W
AK732
Q53
QJ
863
10
KJ42
10862
KJ97
9654
K743
Q10542
QJ8
A109876
A95
A
West
North
East
South
Pass
1
Pass
2
Pass
3
Pass
4NT
Pass
5
Pass
6
DBL
All Pass
BIDDING: North held a
minimum hand but one most people open these days. South liked his
hand much better after his partner raised and bid the slam. (The
Blackwood convention was unnecessary since South knew two aces weren't
missing but some players seem to use it for all slams.) West
couldn't stand it and doubled hoping to score two trump tricks.
This was a mistake.
PLAY: West made the bold
lead of a club. Declarer realized West had no double without a
trump stack so at trick two he led the ten of hearts. When this
won the trick it was a simple matter of leading another toward the
queen. West won the king and tried to cash a club but declarer
ruffed and led a third heart to dummy's queen. A diamond back to
his hand (safer than a spade) allowed declarer to draw the last
trump. He then discarded his diamond losers on the long spade
suit.
Without the double to guide him, declarer would probably start with the
ace of hearts from his hand and consequently lose two heart
tricks. West should have realized the difference between +50 and
+100 was not enough to allow the slam to succeed. Greed is a
terrible thing.