Wednesday 26 November 2014

Tricky lead

Love all
Dealer South
  • Q2
  • 875
  • K1075
  • Q983
  • A1084
  • A1094
  • QJ9
  • 54
N
W
E
S
  • K75
  • K62
  • 83
  • AKJ72
  • J963
  • QJ3
  • A642
  • 106
West
North
East
South
 
Jonathan
 
Paul
12+
Pass
2forcing
Pass
2
Pass
3
Pass
3NT
All pass

After the inverted minor suit raise, West bid his hearts, and East, expecting the contract to be 3NT, pretended to have diamonds. That gave North an awkward lead problem - what's your choice?

The hand was played in 3NT in 15 out of 16 tables in the Tollemache qualifier, often on the auction 1NT (upgrading to 12) - 3NT. North usually led a diamond, and the defence cleared the suit. Declarer then took a club finesse and set up his ninth trick in clubs.

But at my table, Jonathan tried an imaginative 2. That looks bad - declarer now has four spade tricks, which with four tricks from clubs gives him an overtrick. But declarer didn't know that. He thought, took the club finesse successfully, and thought again. Both defenders had followed upwards in clubs, suggesting odd count, so he cashed the top clubs. No luck, South threw 2, ostensibly discouraging, and declarer let go a heart. Now he cleared the clubs, South discarding 3 and declarer 4. North switched to 8 to the jack and ace, and declarer, looking for a ninth trick, decided to lead 10, hoping to pin the 9. No luck there, so, too late, he led a diamond off dummy. North won and played another heart, and South claimed one off.

Wednesday 15 October 2014

Premier League 6S

E-W Game
Dealer South
  • AJ754
  • J6
  • 843
  • A62
N
W
E
S
  • KQ9
  • A1098
  • AK1095
  • K
West
North
East
South
-
-
-
Pass
Pass
Pass
1
Pass
1
Pass
2
Pass
3
Pass
3
Pass
4
Pass
4NTRKCB
Pass
52 'aces'
Pass
5NTgrand try
Pass
6
All pass


Two expert declarers in the Premier League reached 6 on this hand, but both went off on the lead of 4. South's K won the first trick, and they switched to Q.

First, some thoughts on the opening lead. The auction has been informative: declarer has five spades, three diamonds, the ace of clubs, the ace or king of spades, probably with the jack, and not much more. Dummy has five diamonds to the ace and king, four hearts to the ace, three spades to the ace or king and the queen, and a club. If that's all they've got, a heart lead will beat the contract by setting up a heart trick before declarer concedes a diamond, so long as declarer has two or three hearts. A trump or club lead may beat it too (the latter depends on who's got the spade ten), but only if declarer's got three clubs.

Making dummy a bit stronger: the contract is almost always making if dummy's got K (unless diamonds are 4-1). But if instead dummy's got K or declarer has Q, a heart still succeeds. And the heart usually wins if dummy's got Q with the king over it.

So, unless diamonds are 4-1, the heart lead is indicated from most holdings, and not much can be deduced from it.

Now how do you play?

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Monday 13 October 2014

Two hard defences in one

Love all
Dealer South
  • K6
  • none
  • AJ53
  • A865432
  • AQ10983
  • AJ107
  • 10
  • K7
N
W
E
S
  • J5
  • K54
  • Q9762
  • J109
  • 742
  • Q98632
  • K84
  • Q
West
North
East
South
Rob
Jonathan
John
Paul
-
-
-
2Multi
2
3
Pass
Pass
3
All pass

This hand comes from the very friendly annual 'varsity alumni match. But it wasn't entirely out of amity that we got the defence wrong. Ace of clubs lead, club ruff, heart ruff, ace of diamonds, diamond to the queen, king and ruff, and now declarer had no choice but to drop the king of spades. Of course we gave suit preference with our choice of club and heart spot cards, but I failed to signal for the diamond underlead which would have put me in to give a second heart ruff. (And I could have given declarer a chance to go wrong by not covering the queen of diamonds.)

It doesn't help for North to signal at trick two for a diamond return - ace of diamonds, club ruffed to kill the discard, but declarer can simply play ace and another spade and South will be squeezed in the reds. So South has to work out when returning a heart that the best chance is to play North for ace of diamonds and a heart void. Is that possible?

At the time I thought 3NT was a lucky make, but the hand records say not. Can you see the winning defence?

Click here to show (or hide) the answer

Wednesday 24 September 2014

A simple pleasure

N-S Game
Dealer North
  • 963
  • Q874
  • 73
  • K1094
N
W
E
S
  • 10542
  • 103
  • AK108
  • 872
West
North
East
South
Paul
Richard
Jon
Charlie
-
1NT12-14
X
All pass
I think I'm making some slight progress at the game, and I find I'm enjoying getting simple but missable things right more than the occasional fancy play. Here's an example from a matchpoint game. Partner doubles 1NT, perhaps aggressively, and leads the ace of hearts, asking for attitude. You encourage, and he continues with the king, then the six to your queen. Declarer plays the two, nine, and jack from hand and discards a club from dummy. What's your plan?

Click here to show (or hide) the answer

Thursday 5 June 2014

Easy to play, too hard to defend

Love all
Dealer West
  • KQ86
  • 104
  • Q95
  • Q976
  • J32
  • K6
  • KJ1062
  • 854
N
W
E
S
  • A95
  • 972
  • A873
  • A102
  • 1074
  • AQJ853
  • 4
  • KJ3
West
North
East
South
Paul
Ken
Jonathan
Colin
Pass
Pass
1NT1
2
32
All pass
  1. 12-14
  2. To play (forcing hands go through 2NT)
North led the ten of hearts against 3, and my partner put down a suitable dummy. At matchpoints, declarer's first task is to decide if 2 might go off with diamonds 2-2 - if it will, then that's the distribution it's most important to make 3 against. But here, the defence would need to attack spades early and establish two tricks in the suit, which at best is possible only on an unlikely misguess by declarer. So in 3 one should simply aim for as many tricks as possible.

With hearts apparently 6-2, the finesse is better odds than the drop, so after winning the king of hearts at trick two I played the king of diamonds then the jack. I was probably going to run it, so North covered and I won the ace and came back to the ten. I'd have liked to be in dummy to ruff the third heart, but that didn't really matter. I ran the eight of clubs to the jack, ruffed the heart return, and played ace and another club. With this very fortunate spade layout, the suit is frozen once North has taken one honour, so when I let him win the spade switch he was forced to lead into my tenace.

There was not much in the play, but what about the defence? North having failed to lead a club, South has to switch to the suit at trick two. Then North has to cover West's jack or ten of diamonds lead, so that the third round of diamonds can't be won in dummy to ruff the third heart. I don't see how South can know to make that switch.

Wednesday 28 May 2014

8765 opposite AKJ2

My phone buzzed at 1:20 am on Monday morning: it was Tom Townsend asking "How do you play 8765 in hand opposite AKJ2 in dummy for four tricks?". Not because he wanted to be told the answer, which he'd already worked out (and checked with SuitPlay), but because I was the only conscious person he could find who might be interested in such esoterica.

First, suppose you lead to the ace, LHO follows small, and RHO plays the nine. Then you come back to hand and lead the six, LHO playing small again. The queen and ten are still out, and there are three options: play the king, succeeding against RHO's Q9; play the jack, succeeding against 109; or play the three, succeeding against singleton 9. Q9 or Q10 are two distributions, so are 9 or 10, 109 is one distribution. So apparently one shouldn't finesse the jack, but it's roughly a toss-up between playing for the drop and playing the deep finesse. (It's relevant that RHO can't afford to play the Q from Q9 even if he knows you need four tricks from the suit, because he doesn't know you've got the spots for the deep finesse.)

Second, on any other combination of cards (unless the queen has dropped or someone has discarded), the normal and sensible line is to finesse the jack on the second round (detailed analysis, of the sort I've laid out here before, shows that some unlikely defensive strategies can make a different approach better, but they can't make this approach worse).

However, if one chooses to play for the drop in the first case, there's a problem: LHO can deflect you from this line into a losing finesse by playing high on the second round with 1043 (or 943). So the right thing to do is to take the deep finesse.

This does have some practical relevance: almost the exact combination came up on board 118 of the 120-board US teams trials final. At the time Diamond was leading Nickell by 5 IMPs, and the last two boards were to be flat, so this hand decided the match.

NS Game
Dealer East
  • A983
  • 8763
  • Q1084
  • 9
  • K7
  • KJ4
  • AJ53
  • AKJ3
N
W
E
S
  • QJ62
  • AQ
  • K96
  • 8765
  • 1054
  • 10952
  • 72
  • Q1042
West
North
East
South
Weinstein
Greco
Levin
Hampson
11
Pass
22
Pass
33
Pass
44
Pass
45
Pass
46
Pass
57
All pass
  1. Three or more clubs
  2. Natural and forcing
  3. Minimum, three or four clubs
  4. RKCB for clubs
  5. One ace
  6. Queen of clubs?
  7. No
In the closed room, Levin-Weinstein were playing strong no trump, 5-card majors, and three-card minors. When Levin opened one club, Weinstein chose to agree clubs: Levin showed a minimum then one ace and no queen of clubs, so Weinstein gave up in five clubs. The trouble with that was that Levin could easily have had only three clubs (unless the system is no longer as described here). But he had four this time, and five clubs made easily enough, losing the ace of spades and a club.
West
North
East
South
Moss
Meckstroth
Bathurst
Rodwell
11
Pass
22
Pass
23
Pass
44
Pass
5NT5
Pass
66
Pass
6NT
All pass
  1. Precision: 11-15, no 5-card major
  2. Usually denies a 4-card major
  3. 11-13 balanced
  4. Intended as a slam invitation with 4-4 in the minors
  5. Pick a slam - Bathurst didn't know what 4 meant, but he was a bit better than minimum, so...
  6. Moss knows what he intended by this

In the open room, Bathurst and Moss had a murky auction to a poor 6NT, and Rodwell led the ten of hearts. Bathurst won with the ace and led a spade to the four, king and ace. Meckstroth returned the three of spades to the queen and five. Now declarer led the five of clubs to the two, ace and nine, came back to the queen of hearts, and led the six of clubs. Rodwell played the four, and Bathurst was looking at the situation as discussed above. (I'm sparing you my thoughts on the difference between AKJ2 and AKJ3.)

So, giving expert consideration to the arguments, he ran the six? No he did not, he played the jack, and with good reason. Suppose you run the six and it holds. Now you have eleven tricks, and the best chance for a twelfth seems to be the diamond finesse. But if you're going to take the diamond finesse anyway, putting the jack in may well not cost even when clubs are 4-1: If South has three diamonds you've got four tricks in the suit once the finesse succeeds, if he has four or more he'll get squeezed in the minors, and if he's got two North may get squeezed in the pointed suits.

North discarded a heart on the jack of clubs, so declarer cashed the king of hearts throwing his club, and the king of clubs, crossed to the king of diamonds, and cashed the jack of spades throwing dummy's club. Evidently there had been no squeeze, but the diamonds could still be 3-3. Declarer led a diamond towards dummy's AJ5, and North, holding a spade winner and Q8 of diamonds, claimed two off. That was 13 IMPs and the match to Nickell.

That's a reasonable line, but Bathurst could have made his contract by running the six of clubs, then squeezing North in spades and diamonds - worth considering once South shows four clubs and probably some heart length. South, on the other hand, could have prevented this by covering the six of clubs: it's unimaginable that he would do that since he can't know that declarer needs to do more than make four clubs tricks (QJ9x of spades would be enough). East, on the third hand, could have made by cashing a top club at trick two then playing the king of spades from dummy, saving an entry, before getting everything else right. And South, on the fourth hand, could have beaten to contract at trick one by leading a diamond to break up the squeeze. "It's poor that they're still playing single dummy in such a big event", as my correspondent remarked.

Wednesday 12 March 2014

Alarm clock

E-W Game
Dealer East
  • Q4
  • J73
  • AQ1075
  • J76
  • 103
  • AK85
  • K832
  • A83
N
W
E
S
  • A2
  • Q10642
  • 6
  • 109542
  • KJ98765
  • 9
  • J94
  • KQ
West
North
East
South
Paul
Tony
Jon
Peter
Pass
1
X
2
3
3
Pass
Pass
4
4
X
All pass
I played in the EBU simultaneous last night, and very much enjoyed the defence on this deal.  The bidding was aggressive by both sides - South may have reasoned that with both opponents suggesting spade shortage, his partner was likely to have a little something to help.

I led the king of hearts, and, as the competition booklet points out, needed to switch to a diamond at trick two to secure four tricks for the defence.  There are good reasons to get this right after the revealing auction, and many Easts would have played the ten of hearts, explaining to West after he'd done the wrong thing that this was an obvious suit preference for diamonds.  Not so Jon, who played the queen.

The traveller showed spade contracts making eleven tricks once, ten tricks four times, and nine tricks once.