It depends. I usually play them as soon as I get the chance and don't usually hold them. If I think my partner has a King or a 10 to play then I'll play it. If it's the only card you're holding in the suit and the other ace hasn't been played yet then definitely play it so you don't lose it. I tend to save trump cards till the end if I can but I play the Aces early. Just my opinion. Others may disagree.

That is a hard question. Here are 3 links 2 online sites 4 tips cause it would take me a page 2 answer with my strategy. https://entertainment.howstuffworks.com/how-to-play-partnership-pinochle.htm. https://www.britannica.com/topic/pinochle. https://www.powerpinochle.com/forum/showthread.php?tid=394.

@Josh Thanks!

Thank you for the tips everyone. I appreciate the input.

Why do players think it's cool to lead a non counter from the back seat? What I mean by back seat is: when someone takes the bid you then have a"driver& a back seat" the driver is behind the bidder and the back seat is behind the driver.simple. the #1 job for the back seat is to put the driver in the lead. The drives job is to drive into the bidder. Don't go dumping your aces right away. Let the driver drive the bidder off his 10 s. Or whatever. If you drop all your aces right away from the back seat then the bidder clowns the driver with 10s. Please learn how to drive and most of all learn how to ride pay attention to who is driving!!!

Why do seasoned, high rated players think it's cool to just dump their aces especially trump right away? Hold your aces so; from the back seat you can peel the bidder off his pointers if the driver is doing his or her job. And from the driver seat you need to hold your aces so the damn backseat can find you and put you in the lead. Once you get in the lead freaking peel the bidder back! I don't hold my aces and put the driver in the lead so he can just dump the aces out of his hand! It's not a greed game.itsa game of constantly changing partner's. The driver and the back seat aro PARTNER'S!