Here is one I did not concentrate well enough on yesterday (I will get to the bidding and declarer play posts tomorrow).It’s board 20.
Here is the entire hand:
I lead a low spade against East’s 1NT contract. Partner plays the king and declarer wins the ace. Declarer starts the clubs and I hold off until the second round, partner showing out. I was worried about getting our tricks before declarer used his ace of hearts as an entry to the good clubs. But I wasn’t paying attention. I should be able to “see” that declarer has the clubs blocked. I need to remove the ace of hearts entry immediately to prevent him from taking that 4th club trick. I sure failed to use calories on this one!