Hall-of-famer Fred Hamilton played this deal in the 2011 World Championships. He held:

85
J984
AKQ85
KQ
.

What is your opening bid? Personally, I prefer 1NT. I know it is off-shape and that the spade stopper is non-existent, but I'm afraid that if I open 1, I will have a rebid problem. I won't be able to show 15 points if my partner responds with 1 (I would be too weak to reverse to 2, too strong to rebid 1NT, and too wrong to rebid 2). That said, I don't think 1 is a mistake, and in fact, that's what Fred opened.

His LHO overcalled 1, and partner bid 2. What's that? Bidding the opponent's suit in such an auction is obviously not natural. It says nothing at all about hearts. It shows diamond support and at least invitational values. The exact auction is not on record, but Fred ended up declaring 6 (no more opposition bidding). The K was led, and Fred saw:

AK7 A52 J1073 A64

85 J984 AKQ85 KQ

Things look bleak.

There appear to be two inevitable heart losers (declarer can throw only one of his hearts on dummy's clubs). Do you see any chance? One chance is that East has a singleton 10, but that's a long shot.

If West is short in spades, there is a way to make this contract. How so? Just watch.

From the 1 overcall, you know that East has at most a singleton heart. Accordingly, there is no choice but to win the first trick. If you play low, West can continue hearts and give East a ruff. Thankfully, East follows to trick one (but not with the 10).

Declarer drew trumps (3-1), cashed the top clubs from hand, crossed to dummy's A, cashed the A, throwing a heart. He then continued with the K and another spade. East produced the Q, and the deal was now over.

Why is it over? Declarer throws away a heart and allows East to win the Q (a loser on loser play). Now, East is out of hearts and must play a black suit. Declarer throws his last heart loser and ruffs in dummy to claim 920. That's how the play went, but it turns out the defense had made a mistake.

Dlr: East Vul: E-W	AK7 A52 J1073 A64
J92 KQ1073 6 10953		Q10643 6 942 J872
	85 J984 AKQ85 KQ

This was the full deal. After the K lead, declarer has no chance on the actual layout. West had to cling to all three of his spades to avoid his partner from getting endplayed in that suit. However, on one of the trumps, West carelessly parted with a spade (he could have safely thrown two low hearts). If West did keep all his spades, it is East who would have been put to the test. After declarer strips the hand and plays the AK and then another spade, East would have to resist the lazy play of the Q. If he plays his queen on the third round, he is subject to the endplay. He has to play low on the third spade so that West is the one who would win the trick, thus avoiding an endplay.

Many bridge deals are won due to an opponent's error or carelessness. The fact that West made a poor discard takes nothing away from the beautiful plan executed by declarer.