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Double Dummy opening Lead Problem

#1 User is offline   dkham 

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Posted 2013-January-23, 09:48

Full disclosure - I'm preparing this for a Bridge article elsewhere and want to expose it to some experts first! It's an interesting problem though and I think makes for a good challenge.



The question is, what should West lead (knowing all four hands) against South's contract of 6?

(If you want to play around with the hand, you can use this utility http://dh2119.webatu...testPlayer.html and click Deal Number 5)
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#2 User is offline   PhilKing 

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Posted 2013-January-23, 10:02

J. Don't think it beats it, though. There's a sort of black suit double squeeze by delaying the Fork in spades. The six-card ending is:

.............2
.............-
.............K7
.............654
....J54.............A98
....-...............-
....-...............-
....KT9.............J32
.............KQT
.............-
.............-
.............AQ8

On the penultimate trump East discards a club, declarer a club and we are cooked.
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#3 User is offline   ahydra 

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Posted 2013-January-23, 10:07

Declarer has two possible losers (spade and club - the other club goes on a spade), but can't he always succeed simply by playing a spade towards hand? If E grabs his ace, declarer has a second club discard; if not, declarer doesn't lose a spade.

ahydra
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#4 User is offline   PhilKing 

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Posted 2013-January-23, 10:17

View Postahydra, on 2013-January-23, 10:07, said:

Declarer has two possible losers (spade and club - the other club goes on a spade), but can't he always succeed simply by playing a spade towards hand? If E grabs his ace, declarer has a second club discard; if not, declarer doesn't lose a spade.

ahydra


That was the play OP envisaged, but East beats the contract by ducking since declarer loses two clubs instead.
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#5 User is online   Cyberyeti 

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Posted 2013-January-23, 10:44

J is clearly the best lead as anything else loses instantly, but PhilKing is right, declarer can get home.

Does small spade from East beat this at trick one if played the other way up ? I think so.(Edit: but a club is obviously more prosaic)
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#6 User is offline   JLOGIC 

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Posted 2013-January-23, 13:42

View PostPhilKing, on 2013-January-23, 10:02, said:

J. Don't think it beats it, though. There's a sort of black suit double squeeze by delaying the Fork in spades. The six-card ending is:

.............2
.............-
.............K7
.............654
....J54.............A98
....-...............-
....-...............-
....KT9.............J32
.............KQT
.............-
.............-
.............AQ8

On the penultimate trump East discards a club, declarer a club and we are cooked.


prettayyyyy strong
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#7 User is offline   dkham 

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Posted 2013-January-23, 14:35

Can you talk me through that double-squeeze a bit more?
On the penultimate trump East discards a club, declarer a club, and East must discard a club too (else we can setup two Spade tricks). What do we do now?


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#8 User is online   Cyberyeti 

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Posted 2013-January-23, 14:56

Play the spade.

If E wins, you pitch 2 clubs on the KQ, if he ducks, play A and another and N's 3rd x scores.
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#9 User is offline   PhilKing 

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Posted 2013-January-23, 19:22

It's still a good hand.
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#10 User is offline   dkham 

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Posted 2013-January-25, 16:49

OK got it, thanks for the excellent analysis
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