The proper play of suit combinations vary depending on how many tricks are required.  My partner and I recently bid a poor slam.  He needed to play this suit for no losers and made the wrong play.   By the way, no play would have worked.  There's no real good hints about the opponents'high cards or distribution.  There are plenty of entries.  What's the best play for 5 tricks holding:

 

AK1097

 

opposite

 

823

 

?

 

How about 4 tricks?

 

Say you are playing the suit in a match point game and you cash the Ace and the opponent behind the long suit drops the jack.  What's the best play to pick up the suit for no losers?