Both tables played 3NT, Natt lead theJ, and Zamir led a small spade. The two declarers won the lead with theirK and ran the diamonds to find if they could get some information, but none of them could. So both decided to play the clubs, playing a club to the ace and continued with the club finesse. South (in both tables) won the trick with his Q to play the A.
Natt carefully unblocked the suit throwing a high spade, beating the contract but in the other table Zamir played his small spade blocking the suit and declarer was able to make his contract.
You can play the hands card by card
Board 22
Norton opened 1, and Natt showed his spade suit at the one level. South continued with 1NT showing a minimum hand with no spade support. Natt jumped to the three level in spades, the both players continued describing his hands and after Natt’s keycards asking and Norton answer they arrived to the spade slam. TheA in East helped declarer to arrive to 12 easy tricks. At the other table N/S only played game and lose 10 IMPs.
You can play the hands card by card
Board 23
Natt and Norton stopped at the partscore level and received a 9 IMPs reward for their choice when at the other table N/S arrived to an impossible game.