Today’s deal occurred at matchpoints, which might partially explain South’s imaginative rebid of one no-trump. His partner was somewhat less than complimentary after South failed in his contract of three no-trump, West leading the spade 10.

Declarer called for dummy’s spade two, and East took the trick with his king and shifted to a low club. South played low, and West’s queen won. The club return was ducked to declarer’s now-bare ace, and he crossed to dummy with a spade to the queen to run the jack of diamonds. West allowed this to hold, but took the next diamond and shifted to the heart nine. Now declarer was cut off from his hand, and took only seven tricks.

Observe the difference if you play dummy’s spade queen at trick one. If it holds, declarer will always make at least two spades, a heart, five diamonds and a club. On the actual layout, East would take the spade queen with the king and shift to a low club. Be careful: If you duck the club at trick two, the defenders may find the unpleasant shift to the heart 10!

But your counter to the club switch is to rise with the ace, then cross to dummy in spades, to run the diamond jack. Whenever West takes his king, the defense can only cash two clubs. If West shifts to a heart, you win with the ace and cross to hand with the spade jack to run the good diamonds. You take two spades, a heart, five diamonds and a club.

Today’s deal sees South able to respond two no-trump to one heart to show a balanced game force, rather than a game-forcing heart raise. This has no significant impact on the final contract — had South responded two diamonds, North might have raised the suit, letting South rebid three no-trump. In any event, when West leads a fourth-highest spade against the no-trump game, South wins cheaply, after which he must decide which red suit to go after, and what is the best way to develop that suit.

It looks logical to play on diamonds rather than hearts, doesn’t it? With so many combined honors in the eight-card fit, it would appear declarer needs only to find a normal lie of the diamonds to bring in four tricks. Leading the jack from hand will fail if East began with four diamonds to the king-10, so declarer leads low to the queen, West producing the five. (Low to the ace is also reasonable.)

When the diamond eight appears from East, the warning bell should go off! Declarer crosses back to hand with a top club and takes care not to lead the diamond jack, since East might have been sneakily contributing the eight from K-10-8-6! Instead, he leads low to dummy’s seven, assuming West follows with the six. Should this lose to East, declarer has a comfortable route to at least 10 tricks. If the diamond seven wins, as here, declarer should probably just set up his ninth trick from spades.

You blast into the spade slam, against which West leads the club king. Is there anything to be wary of when planning to make 12 tricks?

If trumps are not extremely hostile, you will have 12 easy tricks: six trumps, three hearts, two diamonds and a club. So, your concern should be overcoming a potential 4-0 break in spades. As a preparation against that possibility, ruff a club at trick two, to try to guard against the diagrammed layout.

Next, cash the trump king. If everyone follows, you can claim your contract. If West has four trumps, you will need him to have precisely 4=3=2=4 shape. You continue with the queen and ace of trumps, then ruff a second club. After cashing the diamond ace-king, plus the three heart winners ending in dummy, you ruff a third club at trick 12. West will take the last trick by ruffing your diamond loser. You will have scored six trumps and six plain-suit winners for your contract. But notice that if you had not ruffed a club at trick two, you would not have had the entries to ruff three clubs in hand.

Finally, if it turned out that East had the four trumps, then you would need him not to be too drastically short in any of the side suits. The best order of play to follow would be to cash the top diamonds, then the top hearts, ending in dummy. Now you take a club ruff, then the queen and ace of trumps, followed by leading a fourth club from dummy to make your last trump, whatever East does.

Today’s deal is from Andrew Robson’s latest themed collection, “Counting and Card Placement”, available at baronbarclay.com.

Andrew is one of the top European players. One of his specialities is explaining the game in simple terms. He is much in demand as a teacher and lecturer, and his source material is excellent.

Consider today’s deal, where you have driven to slam in somewhat cavalier fashion after partner’s limit raise in hearts. Of course, the club king wasn’t the card you had hoped to see in dummy — you would happily have traded it for the heart jack.

As declarer you receive the lead of the club two, third and fifth and take the queen with your king. What should be your plan to play hearts for only one loser?

You can do nothing about 4-0 hearts, but if one defender has the bare ace, it seems slightly more likely to be West, since he appears to have the long clubs. Rightly or wrongly, you cross to hand with the diamond ace and lead a heart to the 10, king and ace.

Back comes a spade; plan your next move.

It is best to win the ace, cross to dummy by leading the diamond 10 to the jack, then play a trump. When East follows with the eight, the odds of finessing are clearly better than playing the queen. Why? Because we are weighing up either a singleton 10 or jack with West — in which case he would be forced to follow with that card — against doubleton jack-10. Each of the singletons is almost as likely as one specific doubleton, so the odds are almost 2-to-1 in favor of finessing.

Today’s deal cropped up in a team game, where one declarer came back in triumph with what he was sure was a good result and was somewhat deflated at the comparison of scores.

Our first declarer had played four hearts on the lead of the diamond nine. He took East’s jack in his hand and led a heart to the jack and ace. East could have defeated the game by returning a diamond, but instead he exited passively with a spade. Declarer could regain the lead to draw trumps, eventually losing one trick in spades and diamonds, to come back with 10 tricks.

When it came to the score comparison, his teammates read out minus 420. Our hero was somewhat crestfallen and made his next mistake when he asked his teammates what had gone wrong.

“What do you mean?” came the answer in a surprised tone of voice. “I also led the diamond nine, which went to the jack and ace. Our declarer suspected the lead to be a singleton, so he made the essential play of eliminating clubs before touching trumps.

“Then declarer played on hearts, and my partner won and accurately gave me a ruff. But what could I do now? I was out of red cards, so I had to lead the spade ace and another spade. Declarer could now discard dummy’s losing diamond on the spade king. If I had played a club, giving a ruff-and-discard, the losing diamond would again have disappeared. I assume you played it the same way?”

“Almost exactly,” came the response.

Here you reach four spades after a straightforward Jacoby two no-trump sequence. Your jump to four spades shows a minimum hand with no shortage, after which North has no reason to look any further. When West leads a trump, you should plan the whole play at trick one.

There appear to be three inevitable losers in the minors; you cannot circumvent them, but must instead give yourself the best chance to avoid a heart loser. Rather than drawing all the trumps at once, duck a club at trick two, leaving all your communications intact.

You win the diamond return, draw the remaining trumps, play the club ace and ruff the last club, then cut loose with a diamond. The best the defenders can do is to cash their diamonds ending in East. If West wins the third diamond, he must concede at once.

But let’s say East arranges to win the third diamond; then he must play a heart, and you can play low and run it around to dummy’s nine. If West produces the 10, you take the ace and lead a heart to your jack. This line succeeds unless West has both the heart queen and 10, a 75 percent line. By contrast, if you play on hearts yourself, you are reduced to simply taking the heart finesse. In doing so, you would turn a 75 percent line into a 50 percent chance.

As an expert once remarked: There is no suit that handles better if you lead it yourself, than if the opponents lead it for you.

In the semifinals of the NEC trophy last February, both tables reached three no-trump after each declarer had shown some extras in the contexts of their opening bid styles. Both Wests led a top spade against three no-trump.

In one room, declarer Inon Liran won dummy’s spade ace and played a heart to the king and ace. Barry Myers, West, won to shift to the diamond 10. Declarer won in hand and ducked a heart, won the next diamond and played the heart queen to find the bad news. Then he ran the club jack to Myers, who led a diamond to his partner. She could cash her red-suit winners for down three.

In the other room, Karen McCallum did much better; she ducked the opening lead, won the diamond shift in hand and led a club. West won his queen and pressed on with diamonds. (Wouldn’t we all?) McCallum ducked in dummy, letting East overtake to play the heart jack, ducked around to the queen.

Now McCallum overtook the club jack and ran four club winners, then threw West in with a heart to lead spades for the ninth trick. A well-deserved game swing for McCallum’s team.

After declarer ducks the first spade, either a spade continuation or a diamond shift still beats the game. But if declarer ducks the diamond switch, West must then go back to spades to set three no-trump. And if (as at the table) declarer wins the diamond ace and leads clubs, West must win and continue clubs at trick four to disrupt declarer’s entries!

In the finals of the NEC trophy between Hackett and England/USA, we saw Hackett come back from a big deficit early on in the match to lead at the half. The first deal of the next set did nothing to change the spectators’ minds that momentum had shifted.

At one table, England/USA reached three no-trump after South had cue-bid then bid spades in response to his partner’s overcall in diamonds, since immediate spade bids would not have been forcing. Alas, this sequence was construed by North as bidding stoppers for no-trump rather than showing a suit. The club lead set the no-trump game immediately, as all declarer could do was run spades, then try for a miracle in diamonds.

Four spades, by contrast, looks easy enough; after the defenders led clubs, declarer won and set about arranging his heart ruff for the 10th trick. After West won her ace, she cashed a club and returned a trump. Declarer took the heart ruff, drew trumps, led a diamond to dummy and claimed when the second diamond produced the king from East.

But what if West had shifted to a diamond after winning the heart ace? Declarer must go up with the ace or suffer a ruff, and now he cannot both take a ruff and lead diamonds from dummy at the critical moment.

The only way to make the contract legitimately is immediately to draw trumps ending in dummy, then lead diamonds from dummy — by no means obvious, since the chosen line was proof against most diamond breaks.