South is one of the weaker players and given she overcalled and there are 12 missing HCP, I decided to play her for all of them (I was a little surprised the spade finesse failed). What happened here is the sort of thing I would fall for if I wasn't completely focused. On the run of the diamonds she saw me throw two heart spot cards followed by the king, but it doesn't look like suspicions were aroused or asked herself why throw the heart king. When I cashed my two top spades, she was still looking at the heart queen in dummy, hadn't twigged or worked out I had voided myself in hearts so couldn't get to dummy and she refused to part with the heart ace so threw her slow club winner. 3NT+2 was a top.
I thought this hand was interesting, not because I pulled a fast one, but because in the case of club bridge and the usual standard you find in my region, being alert to this sort of thing and seeing it coming is difficult. It requires concentration through counting, paying attention to partner's count signals, alerting oneself to odd plays or discards by declarer and trying to consider why, and after all that, being confident enough to recognise that ace is worthless and must be discarded to keep a valuable holding in another suit. I have sympathy for South because if I am playing bridge after a full day at work, I can let my thought processes slip and do things like this, and I realise after I have done them.
What was also interesting on this round was that on the next board, I had the opportunity to attempt a genuine automatic squeeze which I spotted from very early on. The squeeze shouldn't have worked because the hand with long hearts didn't hold the diamond king, but South holding ♥8743 threw one when I ran the trumps, so my ♥AKQ5 opposite ♥T6 made four tricks at the end.

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