Another Squeeze with an 8-card suit

Last week, I partnered John Kozero when he made an overtrick on a squeeze with an 8-card suit in a pairs game at the club. Yesterday, another partner, Dave Neuman, executed a squeeze with an 8-card suit when the stakes were much higher. We were playing in a knockout match in the regional in Sacramento. Our teammates were Pat and Jerry Scoville.

First the bidding. Both sides were vulnerable. I held:

S Qx
H AKTx
D xxx
C QTxx

Dave dealt and opened 1 Spade. RHO passed. I bid a forcing 1NT (we play 2/1 game forcing). LHO came in with a preemptive 3 Diamonds. Dave now jumped to 4 Spades. What should I do? Since I had about as much as I could have for a 1NT response, and all of my values were outside of diamonds, I decided that slam was possible, so I invited slam with 5 Spades. This told him that I didn't have a control in diamonds but had a good hand. Dave accepted the invitation and bid 6 Spades. The opponents led diamonds. Dave held:

S AKJTxxxx
H xx
D J
C Ax

Dave ruffed the second diamond. There were 11 top tricks. There were two chances for a 12th trick: Dave's LHO could hold the QJ of hearts, so he could finesse twice, or hold any hand with 5 or more hearts and the King of clubs, in which case he would be squeezed. Dave decided to go for the squeeze. So he ran all but one of his trumps, then cashed the Ace of clubs. With 4 cards left, this was the position:

S -
H AKT
D -
C Q


S x
H xx
D -
C x

When Dave led his last spade, his LHO, who had 3 hearts left and the King of clubs, had to pitch a heart. Dave now pitched the Queen of clubs and took the last 3 tricks with the AKT of hearts. This gave us a 13-IMP swing which helped us win the match. At the other table, our teammates preempted with 4 Diamonds, which proved to be more effective. Opener bid 4 Spades and they didn't get to the slam.