♥ K Q 8 7 2
♣ K Q 10 7 5 3
♠ A 2 ♠ 8 7 6 3
♥ A 9 5 4 ♥ J 6 3
♦ K 10 7 6 4 ♦ J 9 8 3 2
♣ 8 2 ♣ J
♠ K Q J 10 9 5
♦ Q 5
♣ A 9 6 4
West North East South
1♦ 2NT Pass 4♠
The 2NT bid showed hearts and clubs, but South had a solid suit of her own. West, Kate, led the ♣8 taken in dummy with the king. Declarer advanced the ♠4 to the king and ace. West accurately shifted to a diamond. Declarer could see that if she led a club, one of us would ruff, so she tried the ♥K.
West won the ♥A and cashed her ♦K. When declarer played the queen, Kate knew that no more diamonds would cash -- declarer was now void or had the ♦J, so she took her only chance and led a club. I ruffed and that was down one.
Where did declarer go wrong in this simple deal? If she looks ahead, she can anticipate what actually happened. Therefore, she should lead the ♥K at trick two to set up a discard for her diamond loser. Yes, we might get a club ruff, but that and two aces are her only losers.
Plus 50 was s 7.44 IMP loss for North-South. If she had planned ahead and made 420, she would win 2.49 IMPs instead.
When I looked at the scores, I was surprised to see that 13 pairs (out of 73) bid slam off two aces. I was even more surprised to see that three of them made it!
I couldn't make this stuff up, and you can check out this and see all the results if you click here.