This was played from the North hand on the lead of the ♣4. Declarer won the Ace and played ♠AK2, pitching a couple of diamonds and a heart. West returned ♣3 to dummy's ♣K. Now ♠J was cashed, followed by the ♥K. East thought for some time with the singleton♥5. Then apologised and said there was nothing to think about before playing it. Declarer then played ♥J and went up with the ♥A which was ruffed. Down one and cue the director.
Law 73D1 requires players to be careful about their tempo when variations may work to the benefit of their side. The law effectively ends by saying that declarer draws inferences at his own risk. Here I found the ruling difficult as there was nothing to think about on the play of the card whatever East's hearts were!
The ruling we arrived at split the loss, 50% of 4♠ making 50% one down. declarer's claim was that the hesitation made it very difficult to guess right, and that vacant spaces with East marked with 5 spades to West's three improves the percentage for the second round finesse. I feel uneasy about the ruling. What do the legal eagles think?

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4♠ by North - I don't have the bidding!