Articlesβ€ΊDuplicate Tournamentsβ€Ί09/12/2023 Tuesday Game Post-mortem Session

09/12/2023 Tuesday Game Post-mortem Session

66 minutes

Tue, Sep 12, 2023Mine UsluelDuplicate TournamentsNews

Thanks for playing in the Wolpert Bridge Duplicate game. We hope you enjoyed the game. 

For further info about the topics mentioned in the post-mortem video, take a look at the following lessons:

Going for Blood with Penalty Doubles

2/1 Major Suit Slams - Serious 3NT

Transfers after 2NT Rebid

Comments

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Steven EricksonJan 16, 2024

Bd4. In the hand, opponents silent: 1C-1H; 1N-2S is 2S forcing because Responder has such a good supporting hand, or is it a blanket forcing call as in a normal reverse auction? Potentially the auction might have gone 1C-1H; 1S-2H, is the 2S still forcing? In most reverse auctions, Responder has bid once and is unlimited by the time opener has reversed. In this second example, Responder is already rather limited in shape and strength. And if Opener i AKxxx-void-xx-ATxxxx similar to the example in the discussion for Bd4, this may too high. A concern or not

Gavin WolpertTeacherJan 31, 2024

1C-1H-1N-2S is an auction you would need to have an agreement with your partner about. In basic standard bridge, reverses by responder are game forcing. If you adopt two way new minor forcing (on my top 5 most useful conventions), then we use that particular 2S to show 4-4 in the majors and an invitational hand. The second auction you asked about 1C-1H-1S-2H-2S. Here I would think opener just has a minimum hand with 5 spades and 6 clubs. It is definitely not forcing. If opener wanted to game force they could have jumped to 2S over 1H.

Steven EricksonJan 31, 2024↳ replying to Gavin Wolpert

Thanks.

Steven EricksonDec 3, 2023

On Board #7, if OPener's minors were reversed and the auction was 1C-1H; 2D is 2H by Responder weak 5c, NF or is it forcing? If forcing, how does REsponder slow the auction and convey 5c suit? I surely do not want to bid 2S and rebid 3H to show a weak hand when we may not have a fit. And I don't want to bypass a 5c major as Responder? How do you handle this problem?

Gavin WolpertTeacherDec 18, 2023

I think youre asking about a reverse auction. In this auction rebidding our major is forcing. I reccomend my reverses class. Its really important to know exactly what youre doing over reverses. In that class I describe expert standard.

Steven EricksonDec 18, 2023↳ replying to Gavin Wolpert

Thanks

Cheryl RougeSep 18, 2023

Bd 2 - Lots of instructional meat in this hand! I am still not clear why passing p's 2C overcall is the right call. He could have a big hand and with 9 pts I felt like I had to make some response. I had the same thoughts as you about bidding 2NT (only 1 H stopper). But p could have a 4-cd spade or diamond suit, so I bid spades which, of course, was terrible. How do I know to keep quiet with my points and shape (I'm expecting a 6-cd club suit so p's retreating to 3C doesn't seem so bad). Just looking for more of your thoughts as they are clearly right!

Gavin WolpertTeacherSep 30, 2023

How big of a hand can partner really have? They didnt power double so usually no more than 16 HCP. 16 opposite 9 will probably make game but without a fit you dont really have the safety to explore. Youre right that if partner usually has 6 clubs you will be fine, but if partner has 5 you are going to be getting too high more often than you'd miss a game. I don't think its the worst thing in the world to bid, but I think the percentage action at matchpoints (when there is less incentive to bid game and more incentive to get plus scores) is to pass.

douglas edwardsSep 13, 2023

Board 5: why does opener jump to 4NT over the 2NT responder bid on that hand with 12HCP? What extra are they showing jumping rather than bidding 3NT? You showed that in the video.

Gavin WolpertTeacherSep 14, 2023edited

Not sure what youre talking about. You would never bid 4NT with 12 points (unless your partner opened 2NT). If I said that then I was saying "If opener had 18-19 points they would jump to 4NT"

douglas edwardsSep 14, 2023↳ replying to Gavin Wolpert

On Shark bids 4NT if the bidding goes 1S - 2C - 2H - 2NT - the robot bids 4NT. Also in the video at 39:28 you show a 4NT response. I assume now this is a robot set up error and probably a misclick in your video.

Komal KamatSep 14, 2023↳ replying to douglas edwardsedited

Auction was correct initially. Later when he was talking about different hands and came back to play he jumped to final contract by missing 3nt bid.1S- 2C 2H-2N 3N-4N all pass is correct auction. Mind faster than finger case.

Mine UsluelTeacherSep 14, 2023↳ replying to Komal Kamatedited

Thanks for bringing this up to our attention. We corrected it in the notes and corrected the robots bid. It should work properly now.

Carol SmithSep 13, 2023

Hello Gavin. Board 8. How can one be sure a double, say, of 3H by North is for penalty as the opponents have bid and supported? Is this perhaps covered in a lesson? I was thinking of taking the 'dealing with overcalls 2' lesson.

Gavin WolpertTeacherSep 13, 2023

FYI Dealing with overcalls is all about when we open and the opponents overcall. It won't give you any clarity in this spot. Its a really important lesson but just won't solve this question. In general, when the opponents bid and raise a suit and we push them up to the 3 level, double is penalty. It would be very strange for the person who passed 1β™₯ to suddenly want to make a takeout double that would take us to the 4 level without a known fit, when the opponents have said they have half the deck. We don't go exploring for fits at the 4 level, particularly when the opponents have half of the points.

Rahul ChandraSep 12, 2023

On 4 I should have gotten there, chickened out. We had some competition which may have helped: P P 1♣ P 1β™₯ X 1β™  2♦ 3♣ P 3♦ P 4♣ P 5♣ AP After 4♣, partner not having a diamond stopper means they should have good cards and I can safely keycard 4♦ (they won't have DA), find 1+Q. No reason not to. But I'm wondering is it better for me to rebid 3β™  over 3♣ there to shape out?

Gavin WolpertTeacherSep 13, 2023

Yes its critical you show your 6-5. Spades may be the best final contract (even 4β™  just for +650). Even on this hand 4β™  was better than 5♣! Over 4♣ you could also bid 4♦ to cuebid diamonds and let partner bid 4β™₯. You won't ever really know about the 3rd round of spades. If you had bid 3β™  you would know when partner retreats to clubs that they only have at most 2 spades and then can focus on the heart control. (note if you play 1 over keycard then over 4♣ you would need to bid 4S, to deny a heart control and partner would have to bid 4NT to confirm the heart control).

Jon RansomSep 12, 2023

Thanks so much, best learning experience in the bridge world!

Gavin WolpertTeacherSep 13, 2023

Thanks Jon, please spread the word!