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Plan

#1 User is offline   The_Badger 

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Posted 2017-September-23, 03:50



Rubber bridge from a few nights ago. Plan the play. West's 2NT is unusual (minors).

West leads K, East contributing the 3 (standard) If you decide to duck, West switches to 10

N.B. After I withdrew the solution after wank's analysis, I noticed something that changes the dynamics of the hand. On the first trump lead from either hand, East plays the 5.
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#2 User is offline   wank 

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Posted 2017-September-23, 06:20

i should let someone else have a go
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#3 User is offline   The_Badger 

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Posted 2017-September-23, 06:50

i should let someone else have a go

That's good of you. I have withdrawn the solution.
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#4 User is offline   nige1 

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Posted 2017-September-23, 14:45

View PostThe_Badger, on 2017-September-23, 03:50, said:

Rubber bridge from a few nights ago. Plan the play. West's 2NT is unusual (minors).

West leads K, East contributing the 3 (standard) If you decide to duck, West switches to 10

N.B. After I withdrew the solution after wank's analysis, I noticed something that changes the dynamics of the hand. On the first trump lead from either hand, East plays the 5.

Spoiler

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#5 User is offline   LBengtsson 

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Posted 2017-September-23, 15:07

View Postnige1, on 2017-September-23, 14:45, said:


Spoiler



if east have QJT95 youre down
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#6 User is offline   johnu 

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Posted 2017-September-23, 16:29

View PostLBengtsson, on 2017-September-23, 15:07, said:

if east have QJT95 youre down


Do you have a line of play to make if that's the layout?
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#7 User is offline   LBengtsson 

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Posted 2017-September-23, 22:32

yes. if trumps 5-0 east play 5 finesse 7. but is east west trump 5-0 4-1 i dont know false card 5 if 5-0 decclarer think 4-1. am i wrong
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#8 User is offline   Cyberyeti 

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Posted 2017-September-24, 03:24

View Postnige1, on 2017-September-23, 14:45, said:


Spoiler



You really think E doubles on a pile like that ?

I do know the first heart I lead will be the 8 from dummy just to try to catch E covering from J109x or QJ10x
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#9 User is offline   nige1 

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Posted 2017-September-24, 07:51

View PostLBengtsson, on 2017-September-23, 15:07, said:

if east has QJT95 you're down

View PostCyberyeti, on 2017-September-24, 03:24, said:

You really think E doubles on a pile like that ? I do know the first heart I lead will be the 8 from dummy just to try to catch E covering from J109x or QJ10x

If RHO has 4s, then declarer is likely to succeed, whether or not RHO plays an honour.
If RHO has Q J T 9 5 and covers the 8 from dummy then the defence should prevail.
Hence, if you're confident that RHO has 5s for his double, then your best chance is to lead a small from dummy, in the hope that RHO plays a careless 5.
IMO LHO's vulnerable 2N overcall is braver than RHO's double with good major holdings.

Similarly here.

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#10 User is offline   johnu 

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Posted 2017-September-24, 14:36

View PostLBengtsson, on 2017-September-23, 22:32, said:

yes. if trumps 5-0 east play 5 finesse 7. but is east west trump 5-0 4-1 i dont know false card 5 if 5-0 decclarer think 4-1. am i wrong


I may be wrong, but even GIB would play a high heart from QJ1095 on a low heart from dummy.
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#11 User is offline   dokoko 

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Posted 2017-September-25, 14:22

View Postjohnu, on 2017-September-24, 14:36, said:

I may be wrong, but even GIB would play a high heart from QJ1095 on a low heart from dummy.


GIB cannot make deceptive plays on purpose. As playing low cannot gain in double dummy play, GIB won't do it.
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#12 User is offline   ncohen 

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Posted 2017-September-25, 18:44

View Postnige1, on 2017-September-23, 14:45, said:


Spoiler



I see a double dummy declarer line for down 1:

duck first club, win spade, ruff club, duck heart. Now, W is endplayed. a diamond goes to the Q. a club is ruffed in dummy, with a diamond discard. It doesn't matter if E overruffs -- that costs the defense a trump trick.
But, you're going to lose 2 trumps, a diamond, and a club.

You can make with horrible defense:
W returns a club, ruffed in dummy and E discards a spade. Now, cash 2nd S, ruff S, D to A, ruff 2nd spade. Cash two high trumps. E is left with two high trumps when declarer has a diamond and small trump left. Otherwise, if W returns a diamond or E overruffs or discards a diamond on W's club, it's down 1.
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#13 User is offline   Cyberyeti 

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Posted 2017-September-26, 04:19

View Postncohen, on 2017-September-25, 18:44, said:

I see a double dummy declarer line for down 1:

duck first club, win spade, ruff club, duck heart. Now, W is endplayed. a diamond goes to the Q. a club is ruffed in dummy, with a diamond discard. It doesn't matter if E overruffs -- that costs the defense a trump trick.
But, you're going to lose 2 trumps, a diamond, and a club.

You can make with horrible defense:
W returns a club, ruffed in dummy and E discards a spade. Now, cash 2nd S, ruff S, D to A, ruff 2nd spade. Cash two high trumps. E is left with two high trumps when declarer has a diamond and small trump left. Otherwise, if W returns a diamond or E overruffs or discards a diamond on W's club, it's down 1.


But why would you do this as the contract is cold on this layout.

Win the spade
trump to A
Spade to K
spade ruff
A clubs
club ruff
spade ruff
diamond to ace
spade ruff with a top heart to come
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#14 User is offline   johnu 

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Posted 2017-September-26, 13:24

View Postdokoko, on 2017-September-25, 14:22, said:

GIB cannot make deceptive plays on purpose. As playing low cannot gain in double dummy play, GIB won't do it.


GIB makes plenty of plays that can't be right when analyzed double dummy, in addition to making plenty of plays that can never be right unless tossing random cards is the standard of play.
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