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All comments by Franco Baseggio
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Yeah, I sort of swept that under the rug.

Thanks!
6 hours ago
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Just hit “next” a few times in the diagram. Sorry, that was definitely unclear.
12 hours ago
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I'll seek that out, thanks.

I have worked a couple of his constructions available on Darwen's site, and found them excellent examples of the genre.

How much time will you sink into the hardest of these?
Oct. 21
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I once punished someone for a sleepy 2nd hand low, with a blah-7-4-2 holding, even.

JT8
KJ
AT95
J642


A
AQT8732
K63
A8

East opened a weak 2D and I found myself in 6H with no further competition and received a trump lead, both following to the K and J.

In practice I let HJ win and played D5 and let it hold when East played low.

Of course the diamond position was much more of a lock than trumps on GN's deal. And the play was unnecessary as there's a sweet technical line available.
Oct. 21
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I'm too busy working on Paul's excellent double dummy constructions to look it up (e.g. this one is very fun: http://www.doubledummy.net/Problem0317.html).

Ultimately, whether or not this is an example of a strip squeeze as that term is most commonly understood is not that interesting compared to either the position itself, or even the topic of what would be the most _useful_ squeeze taxonomy. The distinction Paul and Frances are making is certainly important regardless of what we call it, and I think we are in complete agreement about the technical similarities and differences among these various squeezes.

Does this have important things in common with positions where a major tenace is important? I think so, but perhaps I've overlooked similarities with other everyone-agrees-not-strip-without-the-count squeezes because of my personal terminology choices.
Oct. 21
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On the whole, squeeze nomenclature is sort of a mess and could certainly be rationalized and improved (an endeavor I'm unusually interested in, thus the over-engagement on this topic). Which also means there may be more than one way today to name them which are equally coherent.

In the meantime, I'm not sure where we'd look for a definitive definition of “strip squeeze” that's better than Kelsey's book with that title (though I would welcome one). That book certainly includes delayed-duck squeezes, of which this is an example (side technical note: you can switch DK and D5 and it still works because D9 beats West, though a heart lead would be unlikely, of course).

In any event, West is certainly “stripped” of a club exit here. Though I'd still call it a strip squeeze even if he'd been dealt a singleton club, as stripping DQ is also important.

Consider this position:

K
-
AJ
2

-
K
32
A

An opponent with A/A/KQ/- is squeezed without the count on CA here. It shares with the present squeeze that a trick is lost after the squeeze matures, but doesn't share that the lost trick is part of how we gain a trick (here it's just trick 13). That latter is, to me, the essential characteristic of a strip squeeze: squeeze someone, then lose a trick to gain.

Some might say that only when a defender is forced to lead to her disadvantage is it a strip squeeze, and lump delayed-duck with one-trick-two-loser triple squeezes, or distinguish them some other way. Fair enough. I'd certainly agree that “strip squeezes” as I understand it is an unwieldy beast of a phylum with wildly diverse positions.
Oct. 21
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On a heart lead, if you win HK and run trumps before cashing CA you reach something like:


xx
x
Kx
xx
….. -
….. J9x
….. AQ
….. xx
-
AQx
xx
Ax

On the next 2 trumps, West isn't squeezed, but dummy is. Once you pitch a diamond, the “duck a diamond” threat loses force.

On a trump lead, you still have a HK link and so only need one diamond in dummy. Run trumps and squeeze West with CA.

@Kopera: the trump does need to be rectified for this squeeze. It's a 2 loser squeeze. In this ending you need to duck CK lead:

Axx
Kx
Kx
xxx
….. -
….. J98x
….. AQJ
….. KQx
x
AQxx
xx
Axx

Then on a heart shift, win HK, cash CA, and run spades. (verified with deep finesse).

Oct. 21
Franco Baseggio edited this comment Oct. 21
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This would have fit right in Kelsey’s book on strip squeezes.

On a trump, CA doesn’t need to be cashed before trumps, though unclear there’s any advantage to keeping it.

I think DA is more than 5:3 to be with the opening lead. The auction is a bit suggestive, and there are restricted choice overtones to a heart lead.
Oct. 21
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Thanks, I'll think about how to do that. In the meantime, parts 1 and 2 may provide a simpler build up to this article.
April 12, 2017
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Murat: deeply sorry, when east has length I don't believe it's sure tricks. It can be made against any layout, but that's not the same thing.
April 7, 2017
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Discussion and answer now posted here: http://bridgewinners.com/article/view/post-heptagons-from-the-5th-dimension/
April 7, 2017
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Glad you like it. You have it right for that case. Basically, simple squeeze against west in clubs and another suit. If that's not available at the outset, the 2nd club triple squeezes east to set it up.

No cross cross element in the other variant. Extensive hints and the solution coming soon, in another post.
April 6, 2017
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You have the basic idea. I wouldn't call it a double squeeze though: traditionally those include an entry in the pivot suit. It's a triple-single saturated squeeze.
April 5, 2017
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Thanks for sending that great position. I guess I'd call it a repeating saturated squeeze. But there are only six points, not eight.

Not that this position has more than 5.
April 5, 2017
Franco Baseggio edited this comment April 5, 2017
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That's all right (except normally the polygon metaphor gets one point per suit,defender).

West also stops the non-ruffing promotion of DT in the final variant where diamonds becomes the pivot suit of a B2 double squeeze.
April 3, 2017
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Yeah, Moon called it a “ruffing guard”, and I agree it is very similar to an ordinary guard menace.

The unusual feature is that it can be recessed. A guard menace cannot, or it will create extra space in the hand with the guard stopper.
April 2, 2017
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Indeed, in the book there are 2 constructions by Tim Bourke along the lines you described.
April 2, 2017
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There are compound strip squeeze possibilities here, though the card reading may be harder. To be clear, I suspect this is not practical (though not finessing in spades early may make obfuscating defense even harder).

Imagine you (after DA) run all trumps, pitching a spade and 2 (high) clubs. In the 6 card ending, LHO will need DJx and can only guard the 3rd round of one black suit, coming down to only 1 in the other. RHO will normally retain 3-3 in the blacks. (If RHO unguards clubs before the last trump, you have an established minor suit squeeze and enough control to try the Spade finesse.)

If, as is likely, the defenders are down to 2 diamonds, you can safely cash one to squeeze RHO. Presumably (3rd round) guards of the black suits are now split (you may have to guess that spades are 2=2 though and just go about establishing a long one).

If LHO no longer stops clubs, throw in RHO in that suit.

If LHO stops clubs and still has DJ, there's only room for one spade. If you have the shapes right but haven't seen the S2 (most likely RHO started with Kx2 tight and never pitched), you're home. Cash clubs, play S7. If LHO follows with the 2, this will throw in RHO. If LHO covers, cover and either SQ will win or RHO will be endplayed to lead away from something like 92 into your A5. If you've seen S2, you hope LHO has stiff SK, or RHO was 1-suit squeezed with a holding like KJT2. It'll go S7-S8-duck and RHO is still end played.

Finally, if on the first club you cash, RHO thinks and pitches CQ, you can pivot to SA, DT to throw in LHO.
April 1, 2017
Franco Baseggio edited this comment April 1, 2017
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Nice hand and nice write up.

I tend to try to analyze these by going back and forth.

The first hurdle is recognizing that the CT is a red-herring and is really just an idle card. Having cleared that, you have what starts out looking like a “Type-R” compound: a spade menace alone opposite 2 “ambiguous” (i.e. doubly protected) menaces in the opposite hand, the H4 and C7.

Expert squeeze defenders know, though, that a double squeeze requires an entry in the ambiguous suit, the C7 has no entry, therefore defense should seek to *not* isolate that suit and instead isolate hearts: i.e. West wants to discard hearts.

So, declarer needs something extra in the heart suit. A guard menace would do (give West KQ, North x, South AT for example). West can pitch one heart, but not two, so the last diamond still extracts a club. This looks more like a clash menace, e.g. if North had stiff HQ. Now West could safely pitch one heart, but the 2nd heart looks like a problem.

Or is it? Pitching 2 hearts on the last 2 trumps establishes HQ, but declarer can't untangle the tricks. In a type-R clash squeeze with one of the opposite & ambiguous menaces having a clash feature, there's an additional entry requirement to the South hand to give it full force.

So, the H6 is necessary. This sort of menace is pretty rare. But I have seen this position before. It's equivalent is on p.185 of Anthony Moon's _Compound Squeezes_. There's one companion with a slightly different arrangement, too. And he cites an example from Bridge with the Blue Team (p.166), though on first inspection it looked a bit different.

Note that my “CT is a red herring” statement is interesting to pursue. This does also superficially look like a type-L compound with H4 and CT as menaces, duly accompanied by entries. Normally if hearts are unguarded on the penultimate trump, declarer crosses to dummy to cash the SK (stripping RHO of an idle card) before coming back to hand with HA (stripping LHO of an idle heart) and plays the last trump to effect a type-R double. Or, if LHO unguards clubs, there are various type-B doubles that could result, but the entries are lacking for all. The last arrow in the quiver for declarer is the alternate menace in clubs: once LHO declines to make clubs the pivot suit, the shape-up-entry requirements are reduced, if, _as is the case here_, declarer has a club menace in the other hand (the C7). Indeed, there's nothing wrong with that ending, the only flaw is that LHO might keep clubs and discard hearts. The enhanced heart menace prevent that, of course.

So, perhaps this is more akin to a type-L alternate threat compound, where the threatened “unguard clubs” defense is fully countered, but the threatened “unguard hearts” defense is not countered in a normal way, only with the enhanced heart menace.

Generalizing: most “fancy” menaces come up in flawed compound squeezes. A normal compound has 2 paths to 2 different double squeezes. often, one of those paths thre's a flaw for declarer, bu the enhanced menace comes to the rescue by forcing the defense to select the other path (or lose instantly).

I may turn this into an article…
April 1, 2017
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When rho follows to 4th diamond, ruff with ht
Nov. 8, 2015
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