Incidentally, having bid my share of 6NT without two cashing tricks (two aces typically), it is enlightening to see how often the world's best do the same. Sometimes the defender with the two tricks is not on lead and is gnashing his teeth as you bring home twelve tricks on a favorable lead.
There are several squeezes without the count, but by far my favorite hand in the book is the following losing card trick. Brother Paulo is at the helm after 2C-2D-4NT-6NT, the lead Dq.
Over to David Bird.
"Eyebrows were raised around the table as East showed out on the diamond lead, discarding a spade. Paulo won with the DA and marked time by cashing two rounds of spades. Further information came to light when West showed out on the second spade, discarding a diamond. When the three top hearts were played, the jack refused to fall and East discarded another spade on the third round. Paulo sat back in his chair. He had an easy eleven tricks by overtaking on the second round of clubs. How could he make a twelfth trick?
Brother Paulo soon found the answer. West held the guard in both red suits so he would be squeezed if a blacksuit winner could be played from dummy. He cashed the CK and overtook the CQ with dummy's Ace. These cards remained.
'Club five, please,' said Brother Paulo.
East won the trick and the Italian flipped the SQ onto the table. The novice in the West seat discarded a diamond and his partner then had to play one or other black suit giving the loead to dummy. West threw another diamond on the club return. When Brother Paulo cashed dummy's remaining winner, the SJ, West had no card to spare. If he discarded the HJ , dummy's HT would be good. He chose instead to throw yet another diamond and Paulo claimed the last two tricks with the DK and the D7 in his hand. "
....." 'It is strange but a 6-0 diamond break was more helpful than a 4-2 break' he said."