Playing imp pairs on the Internet with a crackerjack player sitting on my right, I hold in third seat at favorable vulnerability:

 South
  Q 9 4
  Q J 7 2
  J 7 3
  A Q 10

My partner, a sound opening bidder, passes in first seat and my RHO bids 1. I pass and the next hand responds 1. My partner now comes to life with a double, and RHO redoubles (the support double), which shows three cards in spades.

Several possible bids occur to me, 1NT, 2, 2NT, and 3. Eventually I choose 3, bidding what I think I can make. If they bid 3 over this, I shall be happy to defend. Everyone passes without hesitation, though, and there we rest. The bidding has been:

West leads the 4 of clubs and dummy comes down with:

	North   A 10 2   10 9 5 3   A Q 6 2   9 7
	South   Q 9 4   Q J 7 2   J 7 3   A Q 10

Opening lead: 4

I see that a 2 bid with my hand would have been more than enough, but I am not unduly worried about scoring nine tricks.

I play low from dummy and East produces the jack of clubs. I win the queen and pause to consider the situation. East would play the jack from the king-jack as well as from the jack-empty in clubs. If we were playing at a real table rather than in cyperspace, I think I would know from the table action whether West has led from the king of clubs or not, but, as it is, trick one has been welcome but not particularly informative.

Drawing trump seems to be the obvious way to proceed, so at trick two I play a low heart to the 6 and ten. After a slight hitch, East follows with the 4. My instinct tells me that East has followed low with ace-third, planning to win the second heart and play a third round. It is therefore tempting to continue with a low heart from dummy at trick three, hoping that East rises with the ace and crashes his partner's king.

Looking more deeply into the hand, however, it is apparent that the contract is more or less cold should trumps divide 3-2. If East crashes his partner's doubleton king, that would hardly be good for more than an overtrick. Against that, I could find myself in serious trouble should East's hitch be based on a holding of FOUR trumps to the ace-king. If so, he can pull three more rounds of trump and I will be vulnerable in the club suit. No, this is a hand where it's best to tread carefully.

After doing a little chess thinking, I decide to test the waters by playing a low diamond from dummy. If East goes in with the king, I shall have three diamond tricks set up. If West takes my jack with the king, there is still lots of play to the hand. West will be unable to do any harm in the club suit, and, in the worst case scenario, should he play a spade to East's king and then East plays three rounds of trump, West may come under pressure if he began with 4-1-4-4 shape together with the king of clubs.

After a small pause, East goes in with the king of diamonds and returns a low club. A finesse will do me no good, so I win the ace, ruff a club, and play a trump off dummy. East, who did indeed begin with four trump, plays off the ace and king and then produces a fourth club. I ruff this (East following with the king) and run diamonds. East ruffs the third diamond and switches to a spade, but East has shown up with the ace-king of hearts, king of diamonds and jack of clubs already, so I play a low card from hand and am happy to see West produce the spade king. The full hand was:

		North   A 10 2   10 9 5 3   A Q 6 2   9 7
	West K 6 5 3 6 10 8 5 4 K 6 5 4	East J 8 7 A K 8 4 K 9 J 8 3 2
		South   Q 9 4   Q J 7 2   J 7 3   A Q 10

Post-Mortem
Declarer was correct to tread carefully on this hand because a second heart play at trick three would prove to be fatal. After East clears hearts, a diamond to the queen and king followed by a club through would sink the contract.