Articlesβ€ΊDeclarer Playβ€ΊInteractive Problem 6

Interactive Problem 6

7 minutes

Mon, Oct 16, 2023Gavin WolpertDeclarer PlayVideo: Bridge Hand

Comments

Sign in to join the conversation β€” comments are open to members who've bought a lesson or class.

Frank MorganOct 17, 2023

On whether to try to drop a stiff HJ on the left: Yes in the abstract a void is slightly less likely than a stiff J. But if you assume that W has 10 minor-suit cards there are now just 2 slots from the outstanding pool of 2 Spades and 6 Hearts. So the probability of the dangerous 2 Spades is 2/8 x 1/7 = 1/28, while the chance of a stiff HJ is 1/8 x 2/7 + 2/8 x 1/7 = 1/14, twice as likely. However, for his 5C bid without the CA, W should have 11 minor-suit cards, leaving just 1 slot. So the probability of the dangerous Spade is 2/8, while the chance of the HJ is 1/8, half as likely. Or maybe his 5C bid is based on a H void, another reason for not trying to drop the stiff HJ. On whether to go for the H finesse or the endplay: In the abstract the the endplay is less likely, but on the bidding, W, without the CA or anything (except maybe the HJ) in the majors must have the DKQ and the endplay will work. Is this right?

Kent FurstOct 24, 2023

I definitely know people who would bid a vul 2NT on x xx Kxxxx KQJxx. Intermediate players *love* their Unusual 2NT.

Gavin WolpertTeacherOct 29, 2023

Yeah this thinking is correct but its hard to know what people will do or won't do. People are nuts!

Mark HarringtonOct 17, 2023

I’m liable t misplay trump, so I ruff 2nd club with the ace β™ πŸ˜

David A. F. EllisOct 17, 2023

WOULD THIS BE CALLED LOSER ON LOSER PLAY. DISCARDING A DIAMOND LOSER WITH THE CLUB

Gavin WolpertTeacherOct 17, 2023

A loser on loser play on this hand wouldn't help you. This needed a loser on a heart winner.

Steve ConradOct 17, 2023

Hi Gavin, How about ruffing our the third club and leading a low diamond towards the 10 -- no hearts play needed?

Gavin WolpertTeacherOct 17, 2023edited

I outlined that line of play (similar) in the video too. I am not sure which line is better , one needs the jack of hearts to be in the 4 or 5 card hand (must be 70+%) The other needs both the KQ with the 5 card suit. This feels like less than 70% unless you completely trust the opponents bidding.

Geoff DaviesJan 23, 2024↳ replying to Gavin Wolpert

For what it's worth, I have the Jack bridge program which won the world computer bridge championship 10 times. It is an extremely good card player because before every play it analyses hundreds of hands consistent with the bidding and current state of play. On this hand it doesn't do the heart finesse but tries to drop the JH in two rounds and then ruffs out the last club and executes the diamond throw-in. It looks like Jack expects reasonable suits for a vulnerable 2NT! I like the way it combinines the two chances.

Gavin WolpertTeacherJan 31, 2024↳ replying to Geoff Daviesedited

Their result would entirely be based on their programmed definition for unusual 2NT. If in their definition requires good suits, they would assume the 2NT bidder has KQxxx of diamonds and therefore all of their simulations would make this line a winner. Thats a good idea to use a program to check their line, but be careful not to overly trust it to be correct. It could be right here though. I am not sure.