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A double Morton's Fork at Benito Garozzo's table

#1 User is offline   psyck 

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Posted 2013-April-09, 09:32

OK, the title was just to get you interested, it didn't actually happen at the table where South was sillafu, North was borno & they did not have much of a role to play.



At the table, the declarer just went after ♣'s & ended with 8 tricks. However, as the cards lie, if he went for a Morton's fork in ♠ & followed it with a fork in ♥, he could make the hand. South has to duck the ♠ to prevent 4♠, 2♦, 3♣ tricks; North has to duck the ♥ to prevent 1♠, 3♥, 2♦, 3♣ tricks & after both duck, declarer can go after ♣ to get 1♠, 1♥, 2♦, 5♣ tricks.

I was wondering what would be the best single dummy line of play here & how well the above line fares against it...
Cheers, Krishna.
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#2 User is offline   Cyberyeti 

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Posted 2013-April-09, 09:57

What exactly are you proposing as the Morton's fork line ? The timing is slightly off as W doesn't have a sure entry to hand to cash the spades if S flies the A♠ on the second round with N retaining the A♥.
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#3 User is offline   WellSpyder 

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Posted 2013-April-09, 10:04

View PostCyberyeti, on 2013-April-09, 09:57, said:

What exactly are you proposing as the Morton's fork line ? The timing is slightly off as W doesn't have a sure entry to hand to cash the spades if S flies the A♠ on the second round with N retaining the A♥.

The entries are tricky, which prevents a double fork in spades. But a single fork in spades followed by a single fork in hearts still qualifies as a double fork, I think. You only need one trick in each major if you haven't yet lost the lead since now you can just establish the clubs.
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#4 User is offline   psyck 

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Posted 2013-April-09, 10:35

Correct WellSpyder. Cyberyeti, I specified the 9 possible tricks after each critical point - ♠ through South, ♥ though North, and after both those win - so I hope is clear enough now...
Cheers, Krishna.
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#5 User is offline   Free 

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Posted 2013-April-09, 10:37

That's a nice DD line, but SD this line sucks. If either Ace is in the wrong hand you could easily end up with a disaster.
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#6 User is offline   WellSpyder 

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Posted 2013-April-09, 11:02

View PostFree, on 2013-April-09, 10:37, said:

That's a nice DD line, but SD this line sucks. If either Ace is in the wrong hand you could easily end up with a disaster.

A spade at T3 looks OK to me. If ♠A is offside (or indeed it is onside and taken immediately, but the suit now doesn't run) then you are back to relying on 6 ♣ tricks. Since you have 3 ♦ and 2 aces to lose once the defence gets going you don't have time to give up a ♣ trick anyway.

Now if ♠K wins T3 then I don't see what you lose by playing a heart at T4 since if ♥A is offside you still have ♥K as an entry to hand to repeat the ♣ finesse and play for 6 ♣ tricks.

If you win tricks 3 & 4 in the majors then you can afford to give up a ♣ trick. It is hard to see how you can lose more than 4 tricks this way. Suppose someone can win ♣K, play a major through your remaining honour, regain the lead in the other major and then play the first major again. I think that means the suit has to be 3-3 anyway, so you can't lose 3 tricks in it.

So despite having doubts of my own that this could possible be the right line to play, I haven't actually seen a better SD line yet - though I'm fully expecting someone to point out something obvious I have missed...
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#7 User is offline   Cyberyeti 

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Posted 2013-April-09, 11:21

The only time this line falls down is where the heart loses to the ace and they play a diamond, you play a heart to hand, hook the club and it loses, now you may only make about 5 tricks. You didn't specify pairs/teams, but -200 will look very silly at pairs. You have a similar problem if the spade loses to the ace and they remove your dummy entry, but I don't think that can sensibly be avoided.
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#8 User is offline   psyck 

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Posted 2013-April-09, 12:54

It was a team match on BBO, & as Spyder pointed, the suggested line is reasonable single dummy; unless someone can come up with something better...
Cheers, Krishna.
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#9 User is offline   PhilKing 

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Posted 2013-April-09, 13:38

The winning line only caters for clubs 4-1 onside, and hearts 3-3 onside (you can't sensibly play restricted choice), so it is a bit dubious.

Both black nines appearing early make it far from absurd, though.
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#10 User is offline   cnszsun 

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Posted 2013-April-09, 18:55

The spot cards in ♠ and ♥ make the suggested line perfect. I've found no faults. It's not intuitive so that maybe it's hard to find at the table.
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#11 User is offline   HeartA 

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Posted 2013-April-10, 12:50

I don't get it. What is the opening lead (I assume it was a ♦)? And which side won the ♦ lead? If it were East, there would be no (sure) entry to ♣. So I would assume it was West who won the opening lead. A ♥ lead toward dummy? North can take ♥A, and continue with ♦. What EW can get is 3♥+2♦+3♣.

If East won the first ♦ (♠ toward West ducked, ♥ toward East also got ducked), declarer had to play ♣ from dummy, North can win 2nd ♣ (as East has no more entries) and continue with ♦. I don't see a way EW can get 9 tricks.
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#12 User is offline   Cyberyeti 

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Posted 2013-April-10, 13:54

View PostHeartA, on 2013-April-10, 12:50, said:

I don't get it. What is the opening lead (I assume it was a ♦)? And which side won the ♦ lead? If it were East, there would be no (sure) entry to ♣. So I would assume it was West who won the opening lead. A ♥ lead toward dummy? North can take ♥A, and continue with ♦. What EW can get is 3♥+2♦+3♣.

If East won the first ♦ (♠ toward West ducked, ♥ toward East also got ducked), declarer had to play ♣ from dummy, North can win 2nd ♣ (as East has no more entries) and continue with ♦. I don't see a way EW can get 9 tricks.

Clue, use the next button to see how the play started.

♦K
♣Q
♠K
♥Q
Clubs from dummy to make 4 more ♣ with the ♦A as entry.
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#13 User is offline   HeartA 

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Posted 2013-April-10, 14:03

What "I don't get it" is the "double fork ". It does not exist. if dummy (east) wins first ♦, ♣ cant set up. if west wins first ♦, he cant play a ♠ toward hand.

There is no line that can get ew 9 tricks, double dummy or single dummy.
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#14 User is offline   Cyberyeti 

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Posted 2013-April-10, 15:22

View PostHeartA, on 2013-April-10, 14:03, said:

What "I don't get it" is the "double fork ". It does not exist. if dummy (east) wins first ♦, ♣ cant set up. if west wins first ♦, he cant play a ♠ toward hand.

There is no line that can get ew 9 tricks, double dummy or single dummy.

The double fork is one in spades, one in hearts, they can't fly either ace in the line I've given in the previous post.

W wins the first diamond in hand, hooks the club then leads a spade towards hand.
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