Your left hand opponent opens one spade. Partner passes and right hand opponent responds 2NT (alerted as a game forcing raise with at least four spades). The bidding ends when left hand opponent bids four spades (fast arrival with a minimum opening bid). It’s your lead holding:
Here is where I see too many players go wrong. You’ve probably heard “never underlead an ace against a suit contract. But if you really think it’s the suit to lead, then plunk down the ace”. That’s great advice. Don’t underlead one of your aces!
But coupled with that advice is “it’s usually not a good idea to plunk down an ace on opening lead, because aces are meant to capture kings and queens. When aces are led, they instead draw deuces and treys.” For your hand in this problem do you see any reason to lead one of your aces?
I don’t. There seems to be no reason to be in a hurry with your aces. It looks like you will always get two tricks with them. I suggest going passive and leading a trump. The opponents have nine trumps and it’s unlikely that your side has a trump trick. Make declarer do all the work.
When I saw this hand played the opening leader plunked down his two aces, and declarer made four spades even though partner had one sure trick. Had opening leader instead saved those aces, he would have captured the king of clubs with his ace, setting up another trick for the defense. Leader’s mistake on the first two tricks cost his side a swing of 15 IMPs!