Zia Mahmood famously contributed a BOLS Bridge Tip entitled ‘When they don’t cover, they don’t have it’, Curiously though, he failed to use his own good advice on this deal from the 2010 Philadelphia world championships. Plan the play in three notrump on the lead of the diamond five. You play dummy’s ace and East encourages with the jack.

A simple analysis is that you have eight top winners and need one of the spade or heart finesses. But if you pick the wrong suit, the defenders will surely run the diamonds against you. If you trust your opponents to make helpful discards, you should run the clubs and see which if the major suits your LHO appears to be guarding.

(For the record, in situations of this sort, you should delay asking what discards your opponents play until they have both let go a card. There is no reason to tip them off if their discards might affect your play – they are more likely to be honest if they think you don’t care!)

But let’s assume you are playing against competent opponents, who may gauge the position and try to disguise their holdings in the majors.

How about winning the opening lead and advancing dummy’s spade jack? It may be very hard for East to follow low without a flicker – if he has the king and doesn’t cover he could easily have presented you with an unmakeable contract.

If East plays low without apparent discomfort, rise with the ace and later finesse against the heart king.

When Larry Cohen retired from serious tournament bridge at what many would regard as a ridiculously young age, it was to focus on writing and teaching. Today’s deal is from his latest book: “Larry Teaches Declarer Play at Suit contracts,” available at his website.

Against four spades, South receives the lead of the heart king. He is facing two heart losers, a diamond loser and whatever he might have to surrender in trumps. The percentage play in trumps, missing five, is to lead low to the ace and then finesse the jack. If the suit behaves perfectly, declarer can draw trump and then start clubs, throwing away hearts. But, if he takes the spade finesse and it fails, he will lose four tricks off the top.

What about playing on clubs first? That might work, but if the opponents ruff the second round you are down, and even if they trump in on the third round of clubs, there may well still be residual problems.

The best plan is to partially draw trump. Win the heart lead and take the spade ace and king. If the queen happens to fall doubleton, you draw the last trump and run the clubs, to make at least one overtrick.

What if everyone follows with low spades on the ace and king? Don’t play a third round, but start on the clubs and throw as many hearts away as you can. When the opponents ruff in, it will be with their good trump trick, and you have 10 sure winners.

At the world championships in Lille, the US team lost a very close knock-out match to the eventual winners, Sweden. The Americans had a respectable lead until this deal.

In one room Bob Hamman played five spades as West, and went down when he quite reasonably misguessed trumps, to end up minus 200. In the other room Jeff Meckstroth as North had to decide whether to run from four notrump doubled to five diamonds. Had he done so he would have lost 300 – no triumph, but better than the calamity that actually occurred.

Per-Ola Cullin as West found the killing low heart lead to his partner’s ace. The spade six came back, to the jack and king, and now Cullin cashed the heart king before going into a long huddle. He could cash the spade king, to assure defeat of the contract – or he could try for more, risking a disaster for his side.

Cullin had to decide whether to gamble on his partner Peter Bertheau holding the heart queen and another spade. If he was missing the heart queen, Rodwell was surely going to take 10 tricks. If Bertheau had started with the heart queen and only one spade, the contract would be down fewer than it should.

After long thought, Cullin eventually got it right and played a low heart to his partner’s queen. Another spade through declarer meant an end result of seven down, for the unusual result of plus 1700, and a lead in the match that Sweden would never surrender.

Reaching six diamonds on this deal from the Lille world championships of 2012 is far from easy, though on a heart lead you would have to run the lead to your queen to survive. Others received a trump lead and spade shift, so had no problems. But let’s say West leads a low club; what next?

It looks natural to get the women and children off the street as fast as possible. To protect against 4-0 trump breaks, you need to lead towards the diamond king-queen rather than starting with the diamond jack. When East wins and shifts to a heart, you suddenly have a problem.

Did you notice that a heart shift was going to jeopardize your entries? (Don’t worry if you didn’t — there was nothing you could have done to avoid this). You might as well put up the heart queen now more in hope than expectation — you won’t get any value out of your queen, if you don’t.

When West covers, you take your heart ace and play a trump to the queen. Had trumps split 2-2, you would have been home free, but as it is you need to unblock spades before drawing the last trump.

By cashing only two spades you have left the suit temporarily blocked. But now comes the point of the deal: after drawing the last trump, you pitch your remaining spade honor on the club king and have unscrambled the blockage. You now have two homes for your heart losers, one on the spade jack and on the spade 10.

The world championship encounter between Germany and Ireland at the Mind Sports Games in Lille four years ago saw Ireland win the board at both tables in the bidding, then back it up with accurate declarer play.

Where the German South passed, the Irish bid unopposed to two spades, West opening one heart and raising one spade to two – a style I wholeheartedly agree with. South started with the diamond ace then shifted belatedly to spades. Declarer, Tom Hanlon took the king with his ace, crossed to hand with a heart ruff and ran the diamond jack, pitching a club. He emerged with eight tricks.

In the other room Adam Mesbur opened the South cards, to reach three no-trump. When West led the heart six, declarer won with dummy’s king and played the diamond nine. East correctly covered with the queen, and declarer took the ace and played a spade toward the king. When the king held the trick, he played a spade to the 10 and West could do no better than win with the ace and return a spade to the queen. A heart towards the queen left West little option but to go up with the ace and exit with a heart.

Declarer won in dummy, played a diamond to the 10, cashed the diamond king, and exited with a heart to endplay West. That player had two hearts to cash, but in the three-card ending he was forced to lead a club round to the queen, and declarer had his ninth trick.

The final of the Mind Sports Games in 2012 pitted Poland against Sweden. The Poles might have started as favorites, but Sweden won convincingly, their first ever world title in the open game.

Here is Per-Ola Cullin (a judge in his life outside bridge) at work in the very delicate contract of three no-trump doubled. He might not have enjoyed himself on a club lead, but West quite reasonably started with a low diamond to dummy’s 10.

When declarer led a heart to the queen, West ducked – which was essential —then captured the heart jack at trick three and returned the spade jack – ducked by East. Yes, a club shift or an unlikely overtake of the spade jack by East would have worked better, but neither play was entirely obvious.

Given a reprieve, Cullin made no mistake. He finessed in hearts and cashed the last heart winner, squeezing East. At the table, East pitched a club. Cullin now led a diamond to the king and ace, won the club return to cash the second club, then threw East in with a club to lead spades. That gave him an entry to hand to cash his spade and diamond winner.

Had East kept an additional club winner and pitched a spade on the fourth heart, that would have let West win his diamond ace and exit in clubs. But declarer would have finessed, and after East won the club queen and spade ace he would have had to give dummy or declarer the rest.

Last year we lost one of the nicest players in international bridge, Steen Moller of Denmark. At the 2012 Mind Sports Games in Lille, Steen gave the Daily Bulletin this defensive problem.

When you as West lead a top club against four spades, your partner plays the nine, using upside down signals. He either has the singleton nine, queen-nine doubleton, or three (or more) small cards. What now?

If you decide to try your luck with a red suit, and you guess well, you rate to beat the contract at once. If you guess wrong, though, declarer will surely discard at least one of dummy’s club losers. So should you cash your second club? No: that requires partner to produce two tricks, not one.

The bulletin decided that a spade shift might be best in theory and it certainly works in practice. Finding partner with the spade ace is as likely as any other ace. But if it is wrong, (if, for example, you switch the spade and heart aces) you may well get a second chance, since declarer would not be able to take the discards he needs. And that applies even if declarer also had the diamond jack.

A day later, the bulletin published a mea culpa. Steen had neglected to tell the bulletin that the winning play (not found in either room of his senior match) had been found by his current partner’s wife in the Women’s series! As they remarked, that would be the last time he got invited round to Dorthe Schaltz for dinner!

All this week’s exhibits come from the Mind Sports Games at Lille four years ago, to mark the fact that this year’s event is now under way in Wroclaw, Poland.

This deal is from the final set of the England women’s victory over Russia in the finals, showing that the players were still focusing, even after 12 days’ play.

Against four spades West led the heart 10. Declarer, Susan Stockdale, won with dummy’s ace and drew trump in three rounds, as West discarded the heart two.

Declarer then set up her elimination by cashing off her top hearts, East discarding an encouraging diamond. She then exited with the diamond jack, and West put up the king and returned the seven for the eight, queen and ace. Declarer exited with a third diamond, and could now hold her club losers to one by force.

In the other room Nevena Senior also led the heart jack and the first variation in the play did not come until trick seven, when Heather Dhondy as East was allowed to win the diamond jack with her queen. She switched to the club six and West won her queen. Now West played the diamond 10, a thoughtful deceptive card.

Declarer can still succeed by winning and exiting with a diamond, but when she ducked – assuming East had the diamond king, and hoping West had begun with the doubleton diamond 10, West could exit in diamonds.

Now it was declarer who was endplayed, and forced to lose a second club. One down, and 12 IMPs to England.