♣♦♥♠
This one is a true story and it was in the newspapers (according to Bill Root, who used this example in his classes), probably about 60 years ago. West thought the slam was making due to the strong bidding by South, and his having 9 HCP militated against his partner having anything. He reasoned that if partner had the Jack of
♦, then he could get a
♠ ruff. However, he also figured, better lead a low one, as if dummy has the ten and partner the Jack, declarer may duck and partner may get cute and duck also.
So he led a low
♦. Of course, his heart sank when he saw the Jack of
♦ in dummy. But wait ! Declarer got complacent and played low from dummy !!
When partner got over the shock of winning the first trick with the Ten, he realized that West was desparate to put him on lead, and seeing 11
♠ between his hand and dummy, he did the right thing.
Declarer was according to Root a "well known expert" and his name was never mentioned.