| Dlr: North | ♠ 10 8 7 | |
| Vul: E-W | ♥ A 7 | |
| ♦ K Q J 10 | ||
| ♣ Q 10 6 4 | ||
| ♠ A K 9 6 5 3 | ||
| ♥ K Q J 6 | ||
| ♦ A 7 5 | ||
| ♣ — |
| West | North | East | South |
| 1♦ | Pass | 1♠ | |
| Pass | 1NT | Pass | 2♦(1) |
| Pass | 2♠ | Pass | 6♠ |
| All Pass |
(1) Game-forcing checkback
West led the ♣A. Declarer ruffed and played the ♠A.
All would have been well if East had followed suit: Declarer would have had 12 easy tricks. East’s club discard reduced declarer to needing a trump endplay to bring the contract home.
The first requirement was that declarer needed West to have three clubs, because he needed to reduce his trump length as West followed suit. As will be seen, in the endgame declarer needed to have two trumps and a good heart and West three trumps.
The specifics in the red suits were a little different in that, once the assumption in clubs was fulfilled, declarer could have made 12 tricks at double dummy if West had held 2=4, 3=3 or 4=2 in the red suits. However, this was a single dummy problem. So, considering that playing three rounds of diamonds would work in the first two cases, declarer did just that.
When East discarded on the third round of diamonds, declarer cashed the remaining diamond winner and threw a heart from hand. After ruffing a club, declarer played a heart to the ace and ruffed another club. After cashing the ♥K, declarer held the ♠K 9 and the ♥Q. West held the ♠Q J 4. Dummy had the ♠10 8 and the ♣Q. When declarer led the ♥Q, West was skewered: if he had ruffed high, declarer would have made the last two tricks with trumps. If West had ruffed low, declarer would have scored a trump in dummy and the king of trumps to make his contract. The full deal:
| Dlr: North | ♠ 10 8 7 | |
| Vul: E-W | ♥ A 7 | |
| ♦ K Q J 10 | ||
| ♣ Q 10 6 4 | ||
| ♠ Q J 4 2 | ♠ — | |
| ♥ 9 4 | ♥ 10 8 5 3 2 | |
| ♦ 9 6 4 3 | ♦ 8 2 | |
| ♣ A K 9 | ♣ J 8 7 5 3 2 | |
| ♠ A K 9 6 5 3 | ||
| ♥ K Q J 6 | ||
| ♦ A 7 5 | ||
| ♣ — |
Note that if West had had four clubs and two hearts, he could have avoided the trump endplay by ruffing the third heart and exiting with a club.