Articles›Duplicate Tournaments›10/25/2022 Tuesday Game Post-Mortem Session
10/25/2022 Tuesday Game Post-Mortem Session
70 minutes
Tue, Oct 25, 2022Mine 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:
Board 1: Reverse Drury and Passed Hand Response Structure
Board 2: Hand Evaluation
Board 4: Major Suit Response Structure
Board 5: Redoubles
Board 7: 2C Opening Response Structure
Board 8: Reverse Drury and Passed Hand Response Structure
If you have any questions about the hands you have played in these games, use the Q&A section below to ask your questions.
When asking a question, please reference the deal number. You can also go to BBO, and chose the deal you have played, and from the menu choose 'Export', 'Handviewer link', and copy the link and paste it in the comments together with your question.
Comments
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On board 6 when everyone has 7 cards, and declarer draws the ♦J doesn't it help the defenders if south simply ducks(doesn't rough), and waits a turn so North has no more ♦, and they can rough from the short trump, blocking declarer from the high ♦s?
You've only lost 2 tricks. You can play another diamond throwing a club from dummy letting the short hand ruff, your 3rd loser. But now if they play a heart back you can win in dummy cross to a spade and now north is out of trumps and you can keep playing diamonds. This might seem double dummy, but in reality the defense not ruffing the jack of diamonds would be enough to tell you they are the long hand in trumps. If they play a club back (after they ruff in the short hand) you just ruff in the dummy and can score 10 tricks by getting 2 spades in dummy , 5 in your hand, the AK of hearts and 1 diamond.
Thanks I missed the part where we can make the short hand run out of trumps.
The cardplay on hand 5 is pretty interesting in 4H when analyzed double dummy. As Gavin pointed out in the postmortem, if the defense starts with two club tricks and a spade to the ace, declarer can make the hand now by setting up diamonds in dummy or by squeezing East in spades & diamonds. However, the defense can set it if they duck the first spade trick! Now declarer can't just immediately set up diamonds like Gavin showed in the video, because that line requires drawing all the trump (two diamond ruffs + 3 rounds) and we end up losing the last two tricks as long as East hangs on to their third club. After winning the first round of spades, declarer can't continue spades since East can pop Ace and give partner a ruff, and if they draw trump, there's no squeeze since the count hasn't been rectified--declarer ends up getting endplayed in dummy giving East a diamond trick on top of the A of spades. The other cool line I found was if East starts with a trump lead and declarer plays spades at trick 2. Again if East pops up with the Ace immediately, declarer can make. If they return a second round of trump (a spade return lets declarer set up diamonds like before, while cashing the clubs sets up the squeeze), now there aren't enough entries to ruff out the diamonds, and if declarer tries to rectify the count for a simple squeeze by conceding club tricks, the defense can play diamonds at each opportunity to break up the squeeze (removing the entries). However, after the play begins with a trump lead, spade to the ace, and a trump return, declare can still make--on a strip squeeze! Declarer draws trump and plays trump winners from hand. Here is the position when they lead their last trump: https://i.imgur.com/WEPX6gu.png East must discard their low club exit as anything else gives up the position immediately, and declarer throws a club from dummy. Now North can lead a low diamond and duck whatever East plays. It doesn't matter who wins the trick, the defense can't take anything more than the Ace of clubs (as the suit is blocked) to go with their diamond and their Ace of spades. Note that this strip squeeze possibility isn't there in the line in the first paragraph when the defense starts with two club winners, because in that line the suit doesn't get blocked. Cool hand and a nice illustration of the complexities that make this game so interesting.
Great analysis!
On #2; assuming the 1♦ overcall by west then 1♠ by north shows 5+. I have heard Gavin say to not bid a 4-card major on several occasions. So why not a negative X?
1♣ (1♦) 1♠ only shows 4. Double would promise 4-4 in the majors
On B5, North opens 1♥, East doubles, what is the difference or advantage of XX or 2♦ by South? Does 2♦ shows 10+ HCP and a stopper?
When the opponents make a takeout double our 2 level bids become non forcing. 2♦ would show a weak hand with diamonds. XX is how we show 10+ points.