Concealing the queen by Patrick Jourdain

A play by Shalom Seligman, in brilliancy in defense. This was the deal:

N/S Vul. Dealer North.

                       S T84
                       H 96
                       D T54
                       C J7542
           S K7                   S AQJ6
           H J82                  H KT754
           D AK8763               D QJ
           C 83                   C AT
                       S 9532
                       H AQ3
                       D 92
                       C KQ96

     West       North     East      South
     Bolle     Birman    Kaplan    Zeligman
                Pass       1H        Pass
      2D        Pass       2H        Pass
      4H        Pass      4NT        Pass
      5D        Pass       5H        All Pass

West's response of 2D was two-way, either natural and strong, or a weak raise in hearts. 4NT was Roman Keycard Blackwood, and the response showed one keycard.
Five hearts looks risky but safe. Zeligman led CK, and declarer won and took a club discard on a spade. He then ruffed his club and led a low trump off the table to the ten. Suppose South wins with the queen and plays the fourth spade. Declarer will have to ruff with dummy's jack, return with a diamond and lead a trump from hand. He might play for South to hold bare ace-queen and lead low, but more likely, because North's heart was the SIX he will read the position accurately and lead the king, successfully pinning the nine.
But declarer was not given the chance to find this winning line because Zeligman smoothly won the heart finesse with the ace and then led the fourth spade. Declarer could hardly be blamed for assuming North held the queen of trumps. In this case there was no point in ruffing in dummy.  North would have bare queen, or he would be ruffing from the long holding. Either way the defense would only make one more trick. However, when declarer did not ruff the spade, he was down. North was able to ruff with H9 and South still had the queen guarded.

As this story was being typed, Mehmet Ozdil entered the Bulletin Room bearing news of the same hand. Turkey had also reached 5H :

          West    North    East    South
         Kubac             Intce
                  Pass      1H     Pass
           2D     Pass      2S     Pass
           3H     Pass      4C     Pass
          4NT     Pass      5C     Pass
           5D     Pass      5H    All Pass

South duly led CK, and declarer won and took his club discard on the spades. Now Intce made the unusual, but, on the layout, apparently effective move of leading H10 from hand.  Amazingly, in what was a more difficult position, South found the same play as Zeligman, winning with the ace and leading the fourth spade. Declarer might have found it strange that South would leap in with the ace it he did not still have the guarded queen, but he also assumed North held the queen, and ruffed with dummy's eight. One off!