If at first you don't succeed, you can try something easier. It may also work to try something harder.
At seven spades, South ruffed the club opening lead and took the easy route by drawing trumps and cashing his A-K-Q of hearts. A 3-3 break would have given him a diamond discard on dummy's fourth heart, but as it was he lost a diamond.
Assuming you think a grand slam is worth maximum effort, how would you play?
South must lead a trump to dummy at Trick Two, ruff a club, lead a trump to dummy and ruff a club. He takes the top hearts and runs the trumps. Dummy's last four cards are a heart, the K-4 of diamonds and a club. Declarer has a trump and A-9-5 of diamonds.
When South leads his last trump, West must save a club and can keep only two diamonds. Dummy discards the club, and East must hold his jack of hearts and also only two diamonds. So South takes the K-A and wins the 13th trick with his nine.
A non-club opening lead would beat the contract.
You hold: K Q T 8 7 6 3 K 4 2 9 8 5 2. Your partner opens one spade, you respond 1NT, he bids two diamonds and you return to two spades. Partner then bids three diamonds. What do you say?
A: Your preference bid of two spades showed at most nine points, but partner bid again and remains interested in game. Since you have three useful honors, you must cooperate. Bid four spades or four diamonds. Partner may hold A J 10 6 5, A 4, A Q 7 6 5, 3.
South dealer
Neither side vulnerable

T 8 7 6 3
K 4 2
9 8 5 2
7 5 8 4
T 10 5 T J 9 4 2
Q 8 6 J 10 7 3
Q J 10 7 6 3 A K 4
A J 10 9 6 3 2
A 9 5

South West North East
2 Pass 2 Pass
2 Pass 3 Pass
4 Pass 5 Pass
7 All Pass
Opening lead - Q