Dummy play

The great Dane - Niels Krojgaard.

Another interesting deal from the last evening match was this 3NT against the great Dane. After 1S-1NT;3H-3NT, I got a low club (attitude) lead and looked at the following:

AKT653
K9652
4
A

87
A3
QJ7
QJ9532

I won the ace and ducked a spade from dummy to the 2, 7 and J. West cashed the ace of D, got a discouraging high diamond spot and got out with a low spade which I won in dummy.

When I now cash my spades, East discards an encouraging H and some low diamonds. With one spade left in dummy this is the position:

5
K9652
-
-

-
A3
QJ
QJ

What should I discard on the last spade?

I could now instead leave the spade trick and play two rounds of heart ending in my hand and win if West had the K of D (3-2-3-5).

If heart were 1-5 I should cash the last spade throwing my small heart and would win if:
a) West had the minor suit K's (reading the end game depending on West's discards - which minor to exit in)
b) West's singleton is Q/J/T, with East having to give dummy two hearts in the end after winning the diamond (this wouldn't work if West kept diamonds then but he had discarded one on the spades).

I believed hearts were 1-5 from the play but wasn't certain about the high diamond. I went for option no 2, cashing the last spade (stranding the heart K), and made it when Niels had the remaining honors. Full hand:

______AKT653
______K9652
______4
______A
QJ4__________92
7____________QJT84
AK98_________T6532
KT876________4
______87
______A3
______QJ7
______QJ9532

+600 was worth +10 imps vs a spade partscore.

Deals like this makes the time spent on a card game worth it.